Jewelers draw two lines of distinction between types of jewelry. One line separates natural jewelry from lab-created or plated jewelry, while the other divides the former two types from pure costume jewelry which contains no real precious metals or gems. Costume jewelry still serves a purpose, though, as its relatively low price makes it accessible to almost everyone. Jewelry makers can execute beautiful designs in real, lab-created or costume jewelry.
Jewelers count platinum, silver and all shades of gold as precious metals. These metals resist corrosion and are non-reactive, making them ideal for a lifetime of daily wear. Fine jewelry consists of solid platinum or gold either by itself or as a setting for gemstones. Because of its low cost, silver crosses the border between fine jewelry and costume jewelry readily despite its precious appellation. New techniques in metallurgy place titanium and tungsten jewelry in fine jewelry cases as well, and although these metals are not precious, jewelers now use them in fine jewelry.
Plating a base metal with a precious metal results in a less expensive piece of costume jewelry that still has the gleam of real gold or platinum. Electroplating involves passing an electrical current through an electrolyte solution that contains the more desirable metal and using the item that will receive the plating as one of the electrodes in the solution. Metal ions from the electrolyte fluid coat the jewelry and form a thin but permanently bonded layer on the item. An electroplated coating eventually wears away, but until it does, the jewelry looks exactly like precious-metal jewelry for a fraction of the cost.
The least expensive costume jewelry uses metal alloys that superficially resemble gold or platinum, but have none of the precious metals' corrosion resistance. Polished brass can mimic yellow gold, while nickel approximates platinum's shine. These more reactive metals can cause inflammation, itching and skin discolorations for some wearers. A cheap ring can leave a green or black stain on the wearer's hand after prolonged wear. Dipping costume jewelry into clear sealant can keep it from affecting the skin adversely.
Jewelers recognize four precious gems: diamond, ruby, blue sapphire and emerald. Other gemstones fall into the semi-precious category. When people speak of "real" gems, they mean gems that appeared in the wild via natural means. With the exception of pearls, all natural gems are tens to hundreds of millions of years old. Real natural gemstones command the highest prices, especially if they are of good quality. Real precious and semi-precious gems have settings of equally precious metals or of the strong, non-reactive new titanium and tungsten alloys.
Chemically identical to their natural counterparts, lab-created or synthetic gemstones fill the gap between real and fake. They are manufactured versions of real gems and behave in every regard as the natural gems do. They share the same hardness, density and shine. However, their man-made origins make them less valuable than natural stones. Natural rubies and emeralds in particular bear characteristic flaws that set each stone apart from any other; lab-created versions of these precious gems have no flaws, yet cost less because of their artificial perfection.
Imitation gems are not only manufactured, but they also share none of a real or lab-created gem's characteristics aside from color. The cheapest costume gems are molded plastic beads; crafters and costume designers use these sparkling fake gems for more than just jewelry. Faceted crystals, rhinestones and glass are more durable inexpensive imitation gem options. Cubic zirconia, the synthetic crystalline form of zirconium oxide, costs more than other imitation options because its greater hardness makes it appropriate for high-quality costume jewelry.
- Gemological Institute of America: More about Diamonds: Simulants
- Federal Trade Commission Facts for Consumers; All That Glitters... How to Buy Jewelry; Feb. 2011
- Case Western Reserve University; Electrochemistry Encyclopedia: Electroplating; Zoltan Nagy (ed.)
- International Colored Gemstone Association: Sapphire
- Mayo Clinic; Nickel Allergy - Symptoms; Oct. 2010
- Synthetic, Imitation and Treated Gemstones; Michael O'Donoghue; Butterworth-Heinemann Publishing; Nov. 1997
- Photo Credit Thomas Northcut/Photodisc/Getty Images Jupiterimages/Photos.com/Getty Images
What Does Fake Gold Look Like?
You are probably familiar with the saying "All that glitters is not gold." This is certainly true, but it has probably never...
Allergies to Rhodium Plating
Rhodium is an element in the platinum family known for its resistance to tarnish and corrosion. Some people experience allergic reactions when...
What Does a Non-Reactive HIV Test Mean?
A non-reactive HIV test means that HIV was not found in that testing sample. This test result is commonly referred to as...
How to Tell if a Rolex Watch Is Real or a Fake
A Rolex watch is a symbol of wealth to many people. As a result, there are many counterfeits being made and sold....
How to Test Gems
Testing gems to identify them is a relatively simple, quick process. You need to be very gentle in performing the tests, however,...
How to Identify Precious Ruby Stones
Ruby gemstones are one of the most valuable and precious of all stones on earth. Hence, they are one of the most...
How to Tell the Difference Between Gemstones and Glass
Unscrupulous salespeople have devised many ways to trick the unsuspecting purchaser into buying glass or synthetic material disguised as a precious or...
What Metals Are Hypoallergenic for Wedding Rings?
While in the past there were few alternatives for those whom experienced allergic reactions to their wedding rings, today you have a...
What Are the Benefits of Titanium Jewelry?
Titanium jewelry is easy to take care of, maintains its shine and stands up to daily tests that softer precious metals can't....
The Differences in a Fake Rolex & a Real Rolex
Rolex is a Swiss watch company that is synonymous with style and luxury. Rolex was founded in 1905 by Hans Wilsdorf, a...
Chemicals Used in Gold Plating
The process of depositing a thin layer of gold over another metal for added beauty and durability has been used commercially since...