11/4/2023 0 Comments Dendritic opal properties![]() Light hits the spheres and bounces off at different angles and in different directions creating the dazzling light show that give opals their unique look. Precious Opals are made up of millions of tiny spheres of hard silica (imagine a box of ping pong balls but all different sizes) sitting on top of each other. The ‘play-of-color’ is produced by the silica structure of the gemstone. Opals are divided (broadly) into two types, precious and common, precious opal displays the ‘play-of-color’ which makes the opal so famous and desired while common do not. Hyalite Opals contain minute amounts of radioactivity which surely contribute to their amazing color behavior but does not pose any health dangers. Unexpectedly, the Hyalite gemstone can display this fluorescence or luminescence in daylight conditions which is not just uncommon but quite spectacular – even when you have held the gemstone a number of times you still want to check for batteries or wires! ![]() Tiny amounts of uranium within the gemstone cause dramatic color changes when it is viewed under daylight or in incandescent lighting. These rare gemstones can be faceted into unique shapes ready for jewelry pieces. However some rare examples can be found in vivid greens and yellows with a spectacular color change and fluorescing phenomena. More a gemstone for the collector than the jewelry market, the name Hyalite means water or glass-like and, as the name suggests, are generally colorless and clear. Opal is a very varied family of gemstones and, even with such curious examples as Black Opals, Fire Opals and Boulder Opals, perhaps Hyalite Opals are the most unusual. Natural Hyalite Opal Gemstones Introduction
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