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Post by rmf on Apr 11, 2024 11:23:31 GMT -5
I am thinking that Brazilian Blue quartz is a quartzite with dumortierite grains in with the sand originally. I thought I had info on that but can't find it. It is not a tough as the fancy jasper shown above. Both should be a hardness of 7 though the fancy jasper is much tougher
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quartzilla
Cave Dweller
Member since April 2020
Posts: 1,218
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Post by quartzilla on Apr 11, 2024 22:51:53 GMT -5
Pure dumorterite is pretty hard stuff, 7-1/2 to 8. I slabbed some I picked up in Quartzsite…. My saw was like wtf is this stuff!
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