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Learn - Gems & Care

 

Customer Letters

 

Part I Focusing on Rings

 

Part II Focusing on

 Bracelets, Chains, Pins and Earrings  

 


 

Cross' Jewelry Care Guide

Part I
 

How to Prevent Damage and Reduce Wear on Your Fine Jewelry

Whenever a ring or piece of fine jewelry is worn, wear will occur. The more frequently it is worn, the more quickly it will wear. Periodic maintenance is required on all jewelry to restore and rebuild worn and damaged parts. Prior to the 1970's, rings were primarily set with diamonds mounted into recessed settings which afforded a high level of protection. As the 1970's progressed, styles changed with the re-emergence of prong type settings, a more delicate, open, airy design. This change in jewelry styles occurred at the same time women were becoming increasingly active. These jewelry designs and life style changes have resulted in a higher vulnerability to wear and damage.

Following is a list of common causes of wear and damage to jewelry and specific recommendations on things you can do to extend the life of your settings and protect your gems.

Rings Should Be Removed During the Following Activities

Gardening... Gold has a hardness of 2 1/2, slightly harder than a fingernail. Soil is composed of particles which have a hardness of 7 and harder, which will wear away molecules of gold rapidly. Gloves don't protect against this type of wear. In fact, small particles of dirt inside of the glove will wear prongs and ring shanks even more quickly. The hardness of garden soil will also scratch and abrade many colored gems.

General Yardwork... Even though you wear gloves, it doesn't protect a ring from bumping against a stone wall and bending a prong. An accident that might occur in a split second could bend or break a prong, causing the loss of a gem worth hundreds or thousands of dollars.

Housework... Imagine cleaning out a cast iron radiator and reaching from beneath to remove a stuck toy. Catching a prong or prongs may seriously damage or destroy a mounting worth hundreds of dollars. Additionally, cleaning out the attic or garage, even making beds can cause damage. Wearing gem set jewelry while doing housework should be avoided.

Working in the Kitchen... A kitchen can seem an innocent place to wear a ring, but it is one of the situations where a woman's hands are the most active. One bump against a metal grate in a stove or hit on the edge of a frying pan, can cause a prong to be bent or broken, or a diamond to be chipped, or a colored gem to be scratched. Ask for a free Cross Kitchen Ring Hook, a safe place for your ring while working in the kitchen.

Sporting Activities... While participating in any of the following: golf, baseball, racquetball, snorkeling, scuba diving, horseback riding, camping, mountain climbing, rowing, chopping wood and similar physical activities, rings and other fine jewelry should be removed. There are too many opportunities for an accident to occur in a split second, which could cause hundreds or thousands of dollars in damage.

Beach... Beaches contain a multitude of perils for rings and fine jewelry. First of all, it is one of the most common places for jewelry to become lost. Hands become cold in our icy Atlantic waters, fingers shrink and rings easily slip off. Necklaces, earrings and bracelets are easily lost in the sand. The greatest risk to gem set jewelry is abrasion from the sand. Typical beach sand in the northeastern United States has a hardness of 7-8, and can act like a coarse sandpaper on gold and colored gems. Building one large sand castle can put more wear on a ring than a year of normal use.

Work... Your place of employment could be very hazardous to the safety and longevity of your fine jewelry. Obviously, any job involving machinery or moving hard solid objects, gem-set jewelry should be removed. Any occupation in which a gem or mounting might come in contact with hard objects presents a possible risk.

Fabric... Many years ago, we reset a family diamond into a 6 prong solitaire for a woman who worked in a local department store's yardgood department measuring fabric. Within 60 days she was back, holding her diamond in one hand and her new mounting in the other hand. The prongs holding the diamond had completely worn off. Upon discussion we learned that when she measured fabric, she would set her left hand on the counter and pull the fabric from the bolts across her hand. Molecule by molecule the gold was slowly but repeatedly, all day long, being pulled from the surface of the prongs until they were worn flat.

Another example of wear caused by contact with fabric: A woman requested we attach an adjustable shank to enable her to wear her ring. Six months later she returned for a cleaning and safety examination. The tips holding the diamond were worn flat, the shank was wafer thin. The ring appeared to have 20 years of wear. Questioning her, we learned that she made beds at a local hotel. Tucking sheets in, dozens of times a day, had accelerated the wear on her ring.

Sleep... Certainly it would seem that wearing rings and jewelry to bed would be safe, and yet prongs on rings can wear out in half the time if worn at night. How? Gold against fabric. Time lapse photography shows that most people move hundreds of times during the night while they sleep. A few molecules of gold here, a few molecules of gold there, multiplied times hundreds of nights over the years, represent a considerable acceleration of wear on your fine jewelry. This wear can be substantially increased if the bed sheets include even the slightest trace of a cosmetic, which is often comprised of microscopic substances possessing a hardness of 7 or more. These substances act like fine sandpaper against gold, causing accelerated wear. All jewelry should be removed prior to going to bed.

Other Considerations Regarding Rings

Applause... To the owner of fine jewelry, one of the most baffling types of damage to rings can occur while attending a large concert or symphony production. In the midst of deafening applause, which often follows a great performance, rings worn on opposite hands can literally be pummeled with hundred of little flattened spots. Even more serious damage can occur to gem-set rings from applause when gems in rings on opposite hands come in contact with one another. Prongs can be flattened and bent, gems can be chipped and destroyed. In the darkened performance hall with deafening applause, you can neither see nor hear what is happening to your rings. Applause damage is often one of the most mysterious forms of damage. The solution: When wearing rings on opposite hands, applaud with the fingers of the right hand striking the palm of the left hand.

Loose Fitting Rings... No finger has one perfect size for fitting rings. Time of day, temperature, humidity, physical activity, weight gain or loss, all contribute to as much as a size or two difference in some people. This, in combination with enlarged knuckles, can cause rings to fit loosely. Rings should be made as small as possible to provide a snug fit. If enlarged knuckles prevent snug fitting, adjustable shanks or special fitting devices should be considered to reduce turning. When two rings are worn on the same hand together, wear will occur as the rings rub against one another. If the rings fit loosely, the wear will be accelerated. Diamond wedding and engagement rings set with diamonds with exposed edges, should be soldered together to prevent twisting and turning, and reduce the risk of diamonds damaging one another. It is best not to wear gem-set rings on adjacent fingers, as two gems coming in contact with one another can become scratched.

Handshaking... Women are shaking hands with men more often during the last twenty years… a form of greeting, departure or closing a deal. The delicate designs of women's rings can literally be squeezed out of round by a firm handshake. Gems can be loosened and lost. The solution: Avoid shaking hands with people who are known to have too firm a grip. If you get caught, check to be sure gems are still secure.

 

Active Life Styles Result
in Accelerated Wear.

Shoes wear with use. Tires wear with increased mileage, and yet people often seem surprised that jewelry worn 24 hours a day can show significant signs of wear within a few years. In any activity in which the upper surface of a gem-set ring comes in contact with anything, wear is occurring. It may only be the removal of a few molecules at a time, but wear is occurring. Multiplied times days, months and years, the wear may progress slowly or more quickly. Depending on how active a person you are, daily abrasion is removing molecules of gold and may be wearing your ring out. How and when you wear your jewelry is a personal choice. Many people desire to wear their jewelry all the time. It needs to be clearly understood that doing so will shorten the time between necessary maintenance, or even require replacement of mountings or of gems, which can be lost from settings.

The Gold, Mercury, Chlorine Dilemma

Although gold is impervious to attack from almost all chemical substances, there are two risks of which you should be aware. Mercury is a liquid metal at room temperature. Each year we see several cases of mercury absorption by gold. It causes the yellow metal to turn to a frosty white color. If mercury is not removed immediately, the gold can become brittle and shatter like glass. The common locations to come in contact with mercury are hospitals, doctors and dentists offices, or a broken thermometer at home. Often the person wearing the ring infected with mercury has no knowledge of where they came in contact with the element.

Chlorine, a chemical found in some household cleaning agents and found as an additive in swimming pools, can attack the alloys mixed with karat gold. Prolonged contact will cause pitting and discoloration and ultimately a weakening of the gold in the affected jewelry.

Gold's property of malleability allows it to be crafted into extraordinarily intricate designs. However, because of gold's malleability, even the strongest prong can be bent without you being aware of it occurring. A common example is sitting on the floor and pushing with your hands in the direction of the floor. As you push off, you can easily exert over 100 pounds of pressure against a single prong causing it to bend. This can happen so easily you may never be aware of when or how it occurred.

Gems are among some of the hardest substances on earth, born in fire and intense heat, surviving millions of years in the earth since their formation; and yet all gems, including the hardest - diamond, are subject to wear and damage.

Precautions must be taken to safeguard these precious gems from situations which can cause damage or accelerated wear. Gems, both in storage and while wearing, must be prevented from touching one another. For storage we recommend a jewelry box with assigned storage spaces for each piece of jewelry, or tiny transparent zip lock bags, which provide an excellent means of protecting fine gems and jewelry.

Wear Will Occur

Even with taking all precautions discussed, wear will occur on jewelry with the passage of time. This is natural. Precious metals will develop a patina (microscopic scratches and dings in the surface). It is part of the character a piece naturally acquires. Gems also will show microscopic abrasion on facet junctions. Even diamonds, the hardest substance known to man, are subject to minor nicking on the outer perimeter. Rarely do we see a 100-year old diamond free of microscopic nicks. Wear is a consequence of use. We encourage owners of fine jewelry to use and enjoy their jewelry, but to be aware of the limitations of specific gems, and the care your design selection may require.

If a problem occurs with a piece of jewelry we have created or sold, we first examine it to see if there is any structural reason that could cause the problem, which we would take care of at no charge. Wear which requires restoration work is part of the necessary expected maintenance of a piece of jewelry, the cost of which is the responsibility of the owner. Damage, which is a separate issue from wear, may be covered by the owner's insurance, subject to policy limitations and deductibles. For these risks there is no substitute for quality insurance. As with anything else you purchase, there are different qualities of insurance. Be sure to ask questions of your agent regarding the type and extent of your coverage, including deductibles and other options available for loss, theft and damage, at home and away. Ask your agent if you will receive the full replacement value on an insured piece in the event of a loss, or if the company offers only partial replacement value (a type of coverage, and company to avoid). A quality insurance company will offer replacement at the insured value.

Enjoy and Wear Your Rings

As a balance to all of our cautions, you need to weigh your desire to wear your ring. If a solitaire mounting costs $350 and you wear it out in ten years, it has cost only $35.00 per year. If you have your ring cleaned and checked periodically you can manage the wear appropriately and know when to make the decision to replace the mounting. Understanding how you are wearing your ring and what the consequences of that wear are, are the keys to your success. We want you to wear your jewelry and enjoy it. We hope this information helps you enjoy your fine jewelry for a lifetime.

Finally, we have developed a series of rings which we have specifically designed for changing life styles. These rings are practical and wearable. Ask us, we'll be pleased to show you our newest designs.

I Want to Wear My Ring All the Time!

Cross' newest ring design is part of a collection we've designed For the Way We Live Here in Maine™.

Designed to be worn 24 hours a day*, 365 days a year, it features a low profile to protect your diamond. The diamond is set with platinum completely encircling it for extra protection, and the heavy gold band provides years of wear, yet maintains a feminine style.

If you are considering buying a diamond, see this ring. If you are considering resetting a diamond, see this ring. This style and others in our collection are each designed For the Way We Live Here in Maine™. A design for the new millennium in all price ranges.

(*in almost all situations)

Ring Design and Gem Durability Guide
Important Information to Help You Decide Appropriate Ring Styles

to Match Your Lifestyle and Intended Wear.

Gem Durability

This is a simple guide which combines hardness and toughness for an overall durability rating. This presumes all gems to be free of risky flaws or fractures. If an otherwise hard gem poses a higher risk flaw, it will be given the appropriate durability rating. "No gem is indestructible if hit hard enough."

  1. Hardest, Most Durable - Diamond. Extremely resistant to facet abrasion. Diamonds can chip however, if edges are bumped.
  2. Good Hardness, Good Durability - All ruby, sapphire and spinel, jadeite jade, chrysoberyl.
    Quite hard, usually many years before any facet abrasion begins to show.
  3. Reasonably Hard, Good Durability - Tourmaline, amethyst, all quartz, crypto-crystalline and agate-like material. Lapis Lazuli, garnet, aquamarine, andalucite, nephrite jade, garnet (Emerald, very clear, untreated). Gems will wear well It is normal for facet abrasion to show with the passage of time.
  4. Wearable, but having durability issues - Topaz, turquoise, peridot, kunzite, tanzanite, zircon, malachite, iolite, emerald (by reputation of treatment.) Moderate wear, can expect facet abrasion and surface scuffing.
  5. Very Delicate - Opal, pearl, moonstone, intarsias, fluorite, diopside, some highly included emeralds. Limited wear.

For more detailed information on any gem you may be considering, we will be happy to provide you with a copy of in-depth information sheets.

Gem Hardness Table

Diamond
Silicon carbide Corundum & syn
Sapphire & Ruby
Chrysoberyl
Spinel
Topaz
Rhosizite
Beryl
Emerald* Aquamarine
Phenakite
Zircon
Almandite garnet
Euclase
Gahnite
Gahnospinel
Rhodolite garnet
Tsavorite
Pyrope garnet
Spessartite garnet
Tourmaline
Andalusite
Iolite
Staurolite
Grossularite Garnet
Quartz
Amethyst
Citrine
Danburite
Chalcedony
Peridot
Jadeite
10
9.25
9
9
8.5
8
8
8
7.5-8
7.5-8
7.5-8
7.5-8
7.5
7.5
7.5
7.5
7.5
7-7.5
7-7.5
7-7.5
7-7.5
7-7.5
7-7.5
7-7.5
7-7.5
7-7.5
7
7
7
7
7
6.5-7
6.5-7
6.5-7
   

 

An A-F Rating System for Mounting Durability

Following is a rating system (A-F) for new gem-set rings. This is a guide to help you make appropriate choices to match proper designs with the contemporary lifestyles. Jewelry design and techniques of construction can be likened to clothing and the various fabrics from which clothing is constructed. It is obvious the type of clothing which is appropriate to wear while skiing, mountain climbing, gardening, as a spectator for a sports event, to the office or to the opera. In a similar way, various design techniques in jewelry affect the appropriateness of wear.

This A-F rating system only considers the security or delicacy of the setting. The toughness, durability, and practicality of the gems themselves are examined on page nine using numbers 1-5. The letter and number combined give guidance for overall performance expectations and can assist in appropriate choices.

A
Construction & Durability
Very Practical

Gem perimeter completely encircled with gold or platinum. Gem's edges are protected from bumping or damage. Example: Full bezel or burnish-setting. Some channel-set work.

Expectations & Limitations
These rings can be worn during the widest range of activities. Provided the original bearing is cut properly, the gem is correctly seated, and a sufficient amount of gold or platinum is secured over the edge, the gem will remain the most secure of any of the common setting techniques. An "A" ring can be worn during almost all business and most sporting activities. Over time, gold will typically show evidence of wear and a natural patina will occur on the surface. Even with the durability of an "A" ring, you should avoid contact with hard metal surfaces or stone. Pummeling on the surface or serious abrasion can occur with metal or stone or rock contact.

 

B
Construction & Durability
Practical

Gem partially encircled with gold or platinum protecting majority of perimeter.

Example: A well-made half-bezel, a fishtail mounting, some channel work, and certain handmade settings in which a substantial portion of the perimeter of the gem is protected. This category may also include some contemporary mountings in which the gem is recessed and a portion or portions of the gem are exposed. Certain types of bar-set work and medium weight bezel designs may be included in this category.

Expectations & Limitations
Rings with gems locked in place with half, or more than half their perimeter secured can be very strong. Exposed edges of gems, and the girdle (the perimeter) are at risk of abrasion or chipping. Although this half-bezel technique lightens the design and gives a lighter, more airy, appearance, a higher degree of caution should be exercised when wearing one of these rings than when wearing an "A"ring.

 

C
Construction & Durability
Good

Gem held in place by either 14K white gold, 18K white gold, or properly
constructed platinum head structure. This may be a 6-prong head or a 4-prong head. (Note: Typically 6-prongs are safer because if anything should happen to one prong, the five remaining prongs will usually still hold a gem in place. On 4-prong heads, if the prongs are made sufficiently heavy, the extra weight can compensate and provide as many years of wear as a 6-prong head.) (Most gems, however, which are lost are lost out of 4-prong settings. This risk can be reduced by periodic safety checks.) Medium weight bar-set work may be included in this category. Occasionally heavy yellow gold prongs may be rated in this "C" category.

Expectations & Limitations
Prong-set rings can best be described as relatively thin spindly little shafts of gold or platinum. Usually six or four rising from a central point with a gem resting on a beveled shelf near the top with the tips bent to cinch the gem in place. All prong setting is at risk of inadvertent bumping of a prong which can cause a gem to loosen or come out of its setting. White gold, 6-prongs or heavier construction of prongs can increase the durability of a prong-set ring, but there is a wide range of activities during which all prong-set rings should be removed.

 

D
Construction & Durability
Fair

Gem held in medium to lightweight yellow gold prong work. Also very small gems require proportionately smaller prongs. Even though gems may be set in white gold or platinum, the tiny size of the prongs leave gems vulnerable to both catching and wear.

Expectations & Limitations
This type of jewelry can best be described as limited to dress-up occasions or very careful wear during moderate activity.

 

E
Construction & Durability
Poor

Gems set in very light prong, bezel, or bar work. Typically a minimal amount of gold has been used. Due to the nature of the very light construction, these types of rings and jewelry are the most delicate.

Note where the arrow is pointing above: although the prong appears heavy, it is thin. There is very little going over the edge of the gem to hold it in place.

Expectations & Limitations
This is often problematic jewelry at high risk for damage. Solutions are often limited to resetting gems into a new mounting. Repairs to one part of a ring may only accelerate wear to another portion of the ring or aggravate an underlying condition.

 

 

F
Construction & Durability
Do Not Buy

Gems set in ultra-thin prong work. Examples are rings with paper-thin prongs or only two prongs holding one gem. Often found in jewelry of foreign construction, mass produced television bargain jewelry, or discount house promotional jewelry.

Expectations & Limitations
Avoid buying jewelry in foreign countries. If it is a recent domestic purchase, check to see if they allow returns and attempt to receive a refund. Some designs, although visually attractive and very low priced, have so little holding gems in place there are no practical ways to repair, restore, or even make minor modifications.

 

Part II Focusing on

 Bracelets, Chains, Pins and Earrings

 

        

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Cross Jewelers - Portland, Maine