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Gemstones, Minerals & Fossils
Gemstones and Minerals
❓Your Mineral Identification Questions answered here
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<blockquote data-quote="user 4386" data-source="post: 424929" data-attributes="member: 4386"><p>Sadly unlikely. Quartz will easily scratch glass - try scratching quartz with them (or vice-versa). Although diamonds can fracture and it is conchoidal (so it is like quartz in this respect), alluvial diamonds commonly still show one or more crystal faces (unlike alluvial quartz):</p><p><a href="https://c8.alamy.com/comp/DAW00W/rough-alluvial-diamonds-south-africa-DAW00W.jpg" target="_blank">https://c8.alamy.com/comp/DAW00W/rough-alluvial-diamonds-south-africa-DAW00W.jpg</a></p><p>The lustre of diamonds is adamantine, not vitreous (glassy) like quartz, most visible when you have these minerals side by side. Specific gravity of diamond is 3.5 (not 2.9 as with quartz). Diamonds are hydrophobic (water cannot wet their surface) and readily adhere to grease and oil (commonly use in separation) - I know of no other mineral that sticks to grease.</p><p></p><p>Take the chance and try scratching quartz with one....diamond will easily scratch quartz deeply.</p></blockquote><p></p>
[QUOTE="user 4386, post: 424929, member: 4386"] Sadly unlikely. Quartz will easily scratch glass - try scratching quartz with them (or vice-versa). Although diamonds can fracture and it is conchoidal (so it is like quartz in this respect), alluvial diamonds commonly still show one or more crystal faces (unlike alluvial quartz): [url]https://c8.alamy.com/comp/DAW00W/rough-alluvial-diamonds-south-africa-DAW00W.jpg[/url] The lustre of diamonds is adamantine, not vitreous (glassy) like quartz, most visible when you have these minerals side by side. Specific gravity of diamond is 3.5 (not 2.9 as with quartz). Diamonds are hydrophobic (water cannot wet their surface) and readily adhere to grease and oil (commonly use in separation) - I know of no other mineral that sticks to grease. Take the chance and try scratching quartz with one....diamond will easily scratch quartz deeply. [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
❓Your Mineral Identification Questions answered here
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