lancemountain
starting to spend too much on rocks
Member since March 2017
Posts: 214
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Post by lancemountain on Mar 26, 2019 22:41:11 GMT -5
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Post by vegasjames on Mar 27, 2019 6:23:53 GMT -5
Basalt or limestone. If limestone it will react to acid.
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lancemountain
starting to spend too much on rocks
Member since March 2017
Posts: 214
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Post by lancemountain on Mar 27, 2019 8:01:48 GMT -5
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Mar 27, 2019 12:20:59 GMT -5
From some angles, it looks similar to the Preseli stone (metamorphic dolerite).
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lancemountain
starting to spend too much on rocks
Member since March 2017
Posts: 214
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Post by lancemountain on Mar 27, 2019 21:00:20 GMT -5
From some angles, it looks similar to the Preseli stone (metamorphic dolerite). Interesting! Preseli is the same stone as Stonehenge?
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Mar 27, 2019 21:39:55 GMT -5
Preseli is the same stone as Stonehenge? Yes, but hauled in to there from southern Wales. Tough stuff, so was also used for Neolithic tools. However, the bluish inclusions in my pieces are a bit more "floral" than what I see in yours (I'll see if I can find and take a pic tomorrow). It could also be a different dolerite or something different altogether.
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Deleted
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Member since January 1970
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Post by Deleted on Mar 28, 2019 13:26:11 GMT -5
I couldn't find a rough example, but here is a closeup of a tumble-polished piece... The blue-gray crystals are distinctive for the Preseli Hills material, in this piece mixed with white (altered feldspar), pale green, very dark green granules (likely chlorite and epidote) and occasional grains of black augite. Many pieces include larger, isolated white inclusions (hence the references to "Spotted" dolerite).
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