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Gemstones, Minerals & Fossils
Gemstones and Minerals
Is this a Sapphire? Need confirmation
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<blockquote data-quote="Jamo" data-source="post: 48381" data-attributes="member: 1278"><p>A definitive way to test whether it is topaz or glass is a specific gravity test. This is done by weighing the stone in air on a set of gem scales. Then to way the stone again suspended on a wire into a glass of water. Stones weigh lighter in water. Then by a bit of simple maths you can calculate the specific gravity of the stone. Quartz has a specific gravity of around 2.6 and topaz 3.5. This sounds a bit complicated, but really is quite easy once you've done it a couple of times.</p><p></p><p>Will try and find a step by step of the process and post again. Cheers</p></blockquote><p></p>
[QUOTE="Jamo, post: 48381, member: 1278"] A definitive way to test whether it is topaz or glass is a specific gravity test. This is done by weighing the stone in air on a set of gem scales. Then to way the stone again suspended on a wire into a glass of water. Stones weigh lighter in water. Then by a bit of simple maths you can calculate the specific gravity of the stone. Quartz has a specific gravity of around 2.6 and topaz 3.5. This sounds a bit complicated, but really is quite easy once you've done it a couple of times. Will try and find a step by step of the process and post again. Cheers [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
Is this a Sapphire? Need confirmation
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