Rocks and Minerals B/C

Test your knowledge of various Science Olympiad events.
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whythelongface
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Re: Rocks and Minerals B/C

Postby whythelongface » April 17th, 2018, 8:49 am

The one on the bottom is supposed to be translucent-transparent, slightly brown. I couldn't find a good picture, sorry.
I can't see that making much of a difference. Blue corundum is most often known as sapphire, regardless of how gemmy it is.
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Re: Rocks and Minerals B/C

Postby ScottMaurer19 » April 17th, 2018, 9:15 am

The one on the bottom is supposed to be translucent-transparent, slightly brown. I couldn't find a good picture, sorry.
I can't see that making much of a difference. Blue corundum is most often known as sapphire, regardless of how gemmy it is.
I was look at pictures earlier while making pictures for a test. The variety is supposed to show asterism/chatoyancy caused by inclusions but the picture doesn't exhibit any
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Rocks: 1/1/1
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