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the_hatter
half mad

Registered: 04/18/10
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Mineral Id help
#19281631 - 12/15/13 10:31 PM (10 years, 1 month ago) |
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Found this while camped out in northern Cali this summer. it seriously sparkles like a diamond, not suggesting it is one but ive never seen a natural stone this shiny. Anyone know what it is?
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Edited by the_hatter (12/16/13 01:13 PM)
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r00tuuu123
Now I'm just really piseed



Registered: 04/20/12
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Er kinda looks like Quartz to me.
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the_hatter
half mad

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that was my initial thought but the cylindrical form really throws me for a loop. plus its uncommonly clear and lustrous. it could very well be quartz but we definitely don't get it like this where im from.
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passifloracaerulea



Registered: 11/13/10
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it's euhedral quartz with a geode habit. the cylindrical shape is likely due to it being a limb cast. I have hundreds of similar ones dug in central Oregon. there was a stick that got covered in ash or basalt, burnt, rotted, and left a cast for silica to precipitate into, forming agate and quartz.
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passifloracaerulea



Registered: 11/13/10
Posts: 10,485
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if you live in a limestone bearing state(Midwest or southern states), it could be a crinoid replaced with silica. I've found similar ones in western Kentucky filled with crystals.
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r00tuuu123
Now I'm just really piseed



Registered: 04/20/12
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Loc: I'll be there in a minute
Last seen: 7 years, 10 months
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Quote:
the_hatter said: that was my initial thought but the cylindrical form really throws me for a loop. plus its uncommonly clear and lustrous. it could very well be quartz but we definitely don't get it like this where im from.
Too bad the pics are not bigger but I would say 99% that is quartz. Quartz comes in many colors From black to clear.
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the_hatter
half mad

Registered: 04/18/10
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Last seen: 7 years, 10 months
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Quote:
passifloracaerulea said: it's euhedral quartz with a geode habit. the cylindrical shape is likely due to it being a limb cast. I have hundreds of similar ones dug in central Oregon. there was a stick that got covered in ash or basalt, burnt, rotted, and left a cast for silica to precipitate into, forming agate and quartz.
this sounds right to me, thanks for the help.
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rev0kadavur
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Registered: 03/18/10
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Loc: Richmond & Beyond - California
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wow, that's a really cool one!
sure doesn't look like any quartz I have found, but quartz is a likely suspect.
Been getting into mineral ID... realized its much more complicated than I thought it would be... need to set myself up with a mini field testing kit.
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passifloracaerulea



Registered: 11/13/10
Posts: 10,485
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the best way to get into mineral id is at the gem shows bearing some basic id skills. they are the only places you'll see gems and minerals from all over the world, and from sources and mines that never make it into the mainstream market.
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