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FAQ : What is the history of opal / opals? ... Ancient Romans provided the first real market for opal. With a rich powerful empire, wealthy citizens acquired disposable income and a passion for gems. Opal, whose colours changed with every shift of light, was rarer than pearls and diamonds and destined to be the stuff of...
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www.opalsdownunder.com.au/articles/history.php
www.opalsdownunder.com.au/articles/history.php
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Boulder Opal Facts, Information and Description ... Guide to Gems and Precious Stones Simon & Schuster 1986; Gemstones of the World by Walter Schumann. Sterling Publishing Co., Inc. Gems and Jewelry by Joel E. Arem. Geoscience Press. 1992; Gems in Myth, Legend, and Lore by Bruce G. Knuth.
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www.bernardine.com/gemstones/boulder-opals.htm
www.bernardine.com/gemstones/boulder-opals.htm
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As indicated by the derivation of its name, opal has centuries of history as a treasured gemstone. ... At Spencer the precious opal occurs as one or more thin layers within common opal partially filling gas cavities within a rhyolite-obsidian flow. About 10% of the material is thick enough to cut into solid gems;
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minerals.usgs.gov/minerals/pubs/commodity/gemstones/sp1...
minerals.usgs.gov/minerals/pubs/commodity/gemstones/sp14-95/opal.html
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You could go on talking about the classic features in this high end claddagh opal ring, but what you see is really more than a ring, it is a 300 year tradition, a legend that makes it history's most meaningful jewel. ... White opal and fire opal gems are suited for rings with a gemstone size of 6mm to 8mm.
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www.kaisilver.com/opal-claddagh-ring-01.htm
www.kaisilver.com/opal-claddagh-ring-01.htm
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Opal variations are practically unlimited. They all show in their own special way that unique play of colours – except for Fire Opal, ... The history of Australian Opal began actually millions of years ago, when parts of Australia were covered by a vast inland sea, and stone sediment was deposited along its shoreline.
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www.gemstone.org/gem-by-gem/english/opal.html
www.gemstone.org/gem-by-gem/english/opal.html
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The opal is a unique gemstone, with an amazing array of colors that play within the stone. Considered a lucky stone, the opal's history dates back to the aborigines of the Australian outback and has been made famous by such notables as Shakespeare, Pliny, and England's Queen Victoria. ... australia gems...
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gemstones.suite101.com/article.cfm/october_birthstone_o...
gemstones.suite101.com/article.cfm/october_birthstone_opal
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In Twelfth Night Shakespeare referred to opal as "the queen of gems' " The Roman historian Pliny described it as having "the fire of the carbuncle, the brilliant purple of the amethyst and the sea green color of the emerald, all shining together in incredible union"
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www.cwjewelers.com/stoneopal.htm
www.cwjewelers.com/stoneopal.htm
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Throughout history, opal has been regarded as a stone of good fortune. In ancient times, precious opal was included among the noble gems; it was believed that the gem possessed magical properties.
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www.costellos.com.au/opals/history.html
www.costellos.com.au/opals/history.html
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The rich play of color in Precious Opal gives it unsurpassed splendor. For this reason, it is one of the most fascinating and fabled of gems. Specimens and jewels with a rich play of color command lofty prices. A condition called crazing affects certain opals, causing them to form internal and external cracks.
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www.minerals.net/mineral/silicate/tecto/quartz/opal.htm
www.minerals.net/mineral/silicate/tecto/quartz/opal.htm
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