Allergy bracelets are used for hospital patient-identification tags. Bracelets can be manufactured from leather, cloth, hemp, plastic, metal, rocks, wood, and/or shells. Other material are used to manufacture bracelets are gold, silver, lak, platinum, white gold and using diamonds. Find cuff, link and charm bracelets, each one more unique than the next, and read about the talented artists that make them.

Next, many gems are crystals which are classified by their crystal system such as cubic or trigonal or monoclinic. They may have luminescence and a distinctive absorption spectrum. For example, diamonds are made of carbon (C) and rubies of aluminium oxide (Al2O3). Another term used is habit, the form the gem is usually found in. For example diamonds, which have a cubic crystal system, are often found as octahedrons.

Part of the credit for the almost mythical reverence to diamonds throughout the years belongs to the fact that these beauties are quite rare in their most sought after gemstone quality form. Through the centuries they have been revered and admired by many civilizations. When it comes to history, diamonds have a very long and fascinating record as one of the most intriguing gemstones on the planet. Forged billions of years ago, long before dinosaurs roamed the planet, they have survived the forces of nature to reach us.

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