Opal – Jewelry Notes https://www.jewelrynotes.com An Online Magazine About Jewelry Fri, 13 Feb 2026 22:47:11 +0000 en-US hourly 1 How to Detect a Fake Opal Gemstone https://www.jewelrynotes.com/how-to-tell-a-fake-opal-gemstone/ Thu, 16 May 2013 15:00:00 +0000 http://www.jewelrynotes.com/?p=6740 The Structure of Natural Opal Natural opal is a variety of silica. This stone usually contains between 5% and 10% water and is relatively soft – its hardness rating is 5.5-6.0 on the Mohs scale. Opal can be colorless or colored; its colors can range from white, yellow, orange, and red to green, blue, brown, […]

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]]> Opal Guide: Quality, Symbolism, and Care https://www.jewelrynotes.com/opal-gemstone-guide/ Sat, 30 Jun 2012 03:34:50 +0000 http://jewelrynotes.com/?p=449 As far as precious gemstones are concerned, opals have a relatively sordid history. While they are not as precious as diamonds, opals are no less beautiful and have been used in jewelry for centuries. They’re even mentioned in texts from Pliny the Elder, a philosopher from the years 23 to 79 AD. Opals come in […]

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