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List of Gemstones: Precious and Semi-Precious Stones

WEBStar Sapphire. Star sapphire is a type of sapphire that displays asterism, a star-lik Gem Profile. Staurolite. Staurolite crystals in opaque cross shapes are popular gemstones. …

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URL: https://www.gemsociety.org/gemstone-encyclopedia/

Malachite Value, Price, and Jewelry Information

WEBMalachite is a beautiful decorative stone. Its rich, patterned coloration in shades of green is unique among gems. Malachite's low hardness makes it easy to work, though it still …

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Introduction to Gemology

WEBLicensed under CC By-SA 2.0. Reviewing the different types of gemologists and what they do will make a good, brief introduction to gemology, for collectors as well as those …

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Gemstone Toxicity Table

WEBThis table has toxicity ratings for 280+ gems, based on their composition and potential for bioactivity, as well as descriptions of the hazards they may pose. Gem faceters and …

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Can Wearing Gems That Touch Your Skin Improve Your …

WEBThe healing properties of peridots, like this emerald-cut gem, are said to affect areas ranging from emotional to digestive well-being. However, the bottom edge or keel of this …

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Lapidary Health Hazards and Safety Tips

WEBAvoiding Lapidary Health Hazards: Proper Ventilation and Protective Gear. The major health hazards lapidaries face are dust (inhalation, ingestion, and contact with the eyes) …

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Early History of Jewelry: Ancient Times to the 17th Century

WEBIran and the Mediterranean. The earliest traces of jewelry can be traced to the civilizations that bloomed in the Mediterranean and what is now called Iran around 3,000 to 400 BC. …

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Topaz Symbolism and Legends

WEBHealth, Magic, and Topaz Symbolism. If worn on the left arm, some believed a topaz amulet could protect the wearer from dark magic. In addition, this could relieve arthritis …

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Serpentine Value, Price, and Jewelry Information

WEBSuch gems make very lovely and inexpensive jewelry pieces. All varieties of serpentine have very low hardness, which means they can be scratched very easily. Even …

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Phenakite Value, Price, and Jewelry Information

WEBIn at least one case, near-colorless phenakite rough was submitted for gemological analysis as suspected diamond. Despite outward similarities, including trigon-like features, these …

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March Birthstone: Aquamarine

WEBThe modern birthstone representing March is aquamarine. Famed for millennia for its pure and even blue or blue-green color, potentially large size, and sparkling clarity, the …

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Beginner's Information

WEBGet Gemology Insights. Get started with the International Gem Society’s free guide to gemstone identification. Join our weekly newsletter & get a free copy of the Gem ID …

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Lab-Grown Diamonds FAQ

WEBChemically, physically, and optically, lab-grown diamonds are identical to natural ones. They're real diamonds with the same crystal structure and beautiful sparkle as natural …

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Emerald Enhancements: A Consumer and Trade Guide

WEBRemove the pressure cell and pressurize to about 100 psi. After cooling to room temperature, release the pressure, remove the emeralds, and wipe clean. Simple …

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Citrine Engagement Ring Guide

WEBSunny and bright, citrines symbolize health and happiness. Our citrine engagement ring guide will show you how to pick the perfect gem for your style. IGS may receive …

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Carnelian Symbolism and Folklore

WEBBy Fara Braid. Ancient peoples all over the world favored the warm, reddish gem known as carnelian. This material was easy to cut into jewelry stones as well as carve into seals …

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Onyx Value, Price, and Jewelry Information

WEBThe popularity of onyx has led to some misuse of the term. The most common example of this is so-called "Mexican onyx," "limestone onyx," or "onyx marble." This material is …

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Jade Carvings from Ancient China

WEBA Chinese ink drawing attributed to Guo Xu (1456-1528) shows the form of a man bowing with reverence to a tall rock. Perhaps twice his height, the stone's eccentric shape …

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