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Gemstones of the World revised 5th edition, 2013 by Walter Schumann ISBN 978-1454909538 Smithsonian Handbook: Gemstones by Cally Hall, 2nd ed. 2002 ISBN 978-0789489852 v
Amethyst is a violet variety of quartz. The name comes from the Koine Greek αμέθυστος amethystos from α- a-, "not" and μεθύσκω ( Ancient Greek) methysko / μεθώ metho ( Modern Greek ), "intoxicate", a reference to the belief that the stone protected its owner from drunkenness. [1] Ancient Greeks wore amethyst and carved ...
Opals. Andamooka Opal, presented to Queen Elizabeth II, also known as the Queen's Opal. Flame Queen Opal. Galaxy Opal. Halley's Comet Opal, the world's largest uncut black opal. Olympic Australis Opal, reported to be the largest and most valuable gem opal ever found.
Charoite (/ tʃ æ r oʊ. aɪ t / CHAR-ow-ait) is a rare silicate mineral with the chemical composition K(Ca,Na) 2 Si 4 O 10 (OH,F)•H 2 O, first described in 1978.It is named after the Chara River, despite its being 70 kilometres (43 mi) away from the discovery place.
The classification of the cardinal gems dates back to antiquity, and was largely determined by ceremonial or religious use as well as rarity. The term has largely fallen out of use. The five traditional cardinal gems are: amethyst (purple) – Rare and precious in the Old World until large deposits were found in Brazil. diamond (transparent)
A gem expert is a gemologist, a gem maker is called a lapidarist or gemcutter; a diamond cutter is called a diamantaire. Characteristics and classification [ edit ] A collection of gemstone pebbles made by tumbling the rough stones, except the ruby and tourmaline , with abrasive grit inside a rotating barrel.
Zambia is the world's second biggest producer, with Kagem mine being the world's largest emerald mine responsible for 25–30% of the world's production of gem-quality stones. In 2019 Kagem emerald mine produced 42.4 million carats of emeralds. The Zambian emerald sector is an important contributor of tax revenue to the Government.
Pages in category "Individual gemstones". The following 8 pages are in this category, out of 8 total. This list may not reflect recent changes . List of individual gemstones.