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Request to Identify this Stone Very Strange

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asked Sep 30, 2017 by santoshmlokhande (830 points)

1 Answer

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It appears to be a clear stone with staining from another mineral. Maybe a garnet. The clear stone appears very hard from the conchoidal fracture. The clear stone could be one of quartz, diamond, topaz...sapphire. As most of the gems are harder than a streak plate(unglazed porcelain tile), they will leave no streak and they may scratch the streak plate indicating they are harder than the streak plate which is 6.5 to 7.0 on the Mohs scale of hardness. If you test a specimen, it should be clean and it should be tested in two different places on the stone.

Gemologists do not use this test. It will only give you an idea of how hard the stone is, if it produces a streak, it will reduce the possibilities the minerals could be, narrowing your focus to help identify it.
answered Sep 30, 2017 by Weasel (52,150 points)
Thanks Sir,
For your valuable comment....
This Stone is very hard as I say, secondly it contains some embedded moss like reddish dark brown particulate matter when I cut small piece it does not seperates.. Unaffected by muramic acid. Glass get easily scretched deeply. But Appearance of stone not that much good under light it shows very nice as above. Pl suggest what test I need to do or send it to gemologist for testing.
Most likely in my opinion a microcrystalline quartz type with inclusions. See if you can definitively conclude that by performing a hardness test.

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