![]() Click ‘Customise Cookies’ to decline these cookies, make more detailed choices, or learn more. Third parties use cookies for their purposes of displaying and measuring personalised ads, generating audience insights, and developing and improving products. This includes using first- and third-party cookies, which store or access standard device information such as a unique identifier. If you agree, we’ll also use cookies to complement your shopping experience across the Amazon stores as described in our Cookie Notice. We also use these cookies to understand how customers use our services (for example, by measuring site visits) so we can make improvements. Rough and polished Fire opals from Ethiopia as earrings, finger rings, necklaces, beaded and set, and pendants, Peruvian Pink opals from South America in various settings.We use cookies and similar tools that are necessary to enable you to make purchases, to enhance your shopping experiences and to provide our services, as detailed in our Cookie Notice. Boulder opals from Australia set in sterling silver hand, chosen by Uta and made by skilled craftsmen in fair working conditions. We have a stunning range of opals in our Edinburgh silver shop. Because of their water content, opals are also highly sensitive to sudden changes in temperature. Keeping them in a tight plastic bag, with a damp piece of cotton or fabric will prevent dehydration. If you live in a very dry climate, or keep them in a dehumidified room, some precautions are necessary. If an opal is allowed to dry, it will crack and fade. Their most significant weakness has to do with their water content. Fire opal can sometimes exhibit slight color play, but it is better known for its vivid body color. Precious opal is known for its remarkable ability to diffract light, which results in rainbow-like colors that change with the angle of observation - known as 'play of color'. Opal is famed for its ability to diffract light. Opal is considered to be the national gemstone for Australia, owing to the fact that Australia produces roughly 97% of the world's entire supply of opal gemstones. Its name is derived from the Sanskrit word for 'stone'. More than any other gem, each opal is unique. Obsidian is found in many locations that have seen volcanic activity, including Ecuador, Japan, Italy, Iceland, Indonesia, Mexico and the USA. ![]() It is a l so known as "dragon glass" and the only proven method of killing white walkers. When examined under an electron microscope an obsidian blade is still smooth and even. Even the sharpest metal knife has a jagged, irregular blade when viewed under magnification. In addition to its use as a gemstone, obsidian has been used in cardiac surgery, since well-crafted obsidian blades have a cutting edge many times sharper than high-quality steel surgical scalpels, with the edge of the blade being only about 3 nanometers wide. ![]() These bubbles can produce interesting effects such as a golden or rainbow sheen. Obsidian may contain patterns of gas bubbles remaining from the lava flow, aligned along layers created as the molten rock was flowing before being cooled. Iron and magnesium give the obsidian a dark-green, brown or black color. In some stones, the inclusion of white crystals of cristobalite produce a blotchy pattern, known as snowflake obsidian. It's beautiful spectralite qualities give a lustre similar to Tiger's eye. ![]() It is formed when felsic lava extruded from a volcano cools without crystal growth. Obsidian is naturally occurring volcanic glass. ![]()
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