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They seem quite similar when I shop at craft fairs.

2007-09-24 07:02:09 · 2 answers · asked by Anonymous in Science & Mathematics Earth Sciences & Geology

2 answers

Moonstone is an alkali feldspar, while Chalcedony is silica, like quartz. This means that moonstone should have cleavage (fracture in straight lines), while Chalcedony will have concoidal (curved) fracture. But in a shop piece that has been shaped, you won't see this. Under a microscope, moonstone will have "twinning", and, related to this, you should be able to see the moonstone shimmer if it is polished well. Also Moonstone (hardness of 6) is softer than chalcedony (hardness of 7). So glass or steel will scratch Moonstone but not easily Chalcedony.

2007-09-24 21:32:21 · answer #1 · answered by Anonymous · 0 0

........ well if one of them is stamped "Made on the Moon" ..... I thinks its safe to say that its an authentic moonstone.

2007-09-24 07:09:42 · answer #2 · answered by Ronatnyu 7 · 1 3

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