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Gemstones, Minerals & Fossils
Gemstones and Minerals
Crystal cleaning ?
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<blockquote data-quote="Lefty" data-source="post: 367916" data-attributes="member: 2976"><p>Proceed with caution if you're going to scrape them - but in my experience, quartz crystals are not really all that fragile, they're pretty hard. Quartz is just coming into the hardness range where gems cut from it are good for general jewellery setting. If you regularly see a certain type of stone set in finger rings with no special precautions taken to guard the stone - ie, amethyst, which is a variety of quartz - then it's a good bet they are reasonably hard. I think Hunting the yellow probably has it - there were probably some hairline fractures in the crystal that broke so it was likely already susceptible. Do be careful scraping around sharp crystal face edges and the point as these can chip more easily.</p><p></p><p>It's fairly common for quartz crystals to have a skin on the outside while being perfectly crystal clear inside.</p></blockquote><p></p>
[QUOTE="Lefty, post: 367916, member: 2976"] Proceed with caution if you're going to scrape them - but in my experience, quartz crystals are not really all that fragile, they're pretty hard. Quartz is just coming into the hardness range where gems cut from it are good for general jewellery setting. If you regularly see a certain type of stone set in finger rings with no special precautions taken to guard the stone - ie, amethyst, which is a variety of quartz - then it's a good bet they are reasonably hard. I think Hunting the yellow probably has it - there were probably some hairline fractures in the crystal that broke so it was likely already susceptible. Do be careful scraping around sharp crystal face edges and the point as these can chip more easily. It's fairly common for quartz crystals to have a skin on the outside while being perfectly crystal clear inside. [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
Crystal cleaning ?
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