carloscinco
fully equipped rock polisher
Member since July 2008
Posts: 1,639
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Post by carloscinco on Oct 23, 2010 9:29:05 GMT -5
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Post by jakesrocks on Oct 23, 2010 11:59:13 GMT -5
No clue, but I sure hope someone can Id it. I have 2 nice chunks of the same material, that came from an old collection that I inherited.
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Post by texaswoodie on Oct 23, 2010 12:49:41 GMT -5
Calcite
Curt
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Post by jakesrocks on Oct 23, 2010 12:59:41 GMT -5
Don't think they're calcite Curt. Mine look just like those in the 5th pic. They're slightly rounded plates, with a pearly luster on freshly broken edges, and they don't fizz in mild acid.
Don
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Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,466
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Post by Sabre52 on Oct 23, 2010 14:56:39 GMT -5
Selenite rosettes, a form of gypsum crystals.....Mel
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Post by texaswoodie on Oct 23, 2010 16:05:01 GMT -5
Selenite, calcite, heck I knew it was some kind of ite. Curt
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Post by jakesrocks on Oct 23, 2010 16:09:38 GMT -5
I thought it might be selenite. Hardness, streak and luster were all correct. Just wanted another opinion before I put a label on them. Carlo, I hope you picked up a bunch of nice specimens. If nothing else, they'll make good trading material.
Don
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carloscinco
fully equipped rock polisher
Member since July 2008
Posts: 1,639
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Post by carloscinco on Oct 23, 2010 16:32:16 GMT -5
Thanks for the ID Mel, you're a big help! Ileft the crystals in place but I know where they're laying. I did bring some mica back for my grand-daughters show and tell. I told them about the old days when sheets of glass were scarce and the cowboys used to have to use mica for their cell phone screens.
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Post by jakesrocks on Oct 23, 2010 16:50:54 GMT -5
Hah ! Goodun. Next you should find an old typewriter and dial phone for show and tell.
Don
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Post by jakesrocks on Oct 23, 2010 19:34:10 GMT -5
Carlo, you really should pick up some of those specimens. There are mineral collectors on here who would be happy to trade for a nice specimen from that area. I might even be interested myself. ---- Don
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carloscinco
fully equipped rock polisher
Member since July 2008
Posts: 1,639
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Post by carloscinco on Oct 23, 2010 20:12:49 GMT -5
It'll be a while before I get away again but I'll try and remember to box up some of the nice ones next time.
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Post by jakesrocks on Oct 23, 2010 20:42:09 GMT -5
I know at least one of us will be waiting to see pics. ---- Don
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rons
spending too much on rocks
Member since March 2010
Posts: 450
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Post by rons on Oct 25, 2010 7:18:57 GMT -5
Nice find, looks like Mother Nature did a lot of the extraction work for you..hope you get a chance to get back and collect, looks like there are some fine specimens there...Good luck and have a great day
Ron
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Post by johnjsgems on Oct 26, 2010 6:53:40 GMT -5
After they dry out the tips of the blades should turn white and make striking specimens. We used to buy banana boxes of clusters from a Mexican dealer that brought them from Sonora. Some of the clusters would fill a box.
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damammy
has rocks in the head
Member since January 2009
Posts: 697
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Post by damammy on Oct 27, 2010 20:52:44 GMT -5
I am sure Mel is right, I thought it looked like barite. Donna
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Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,466
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Post by Sabre52 on Oct 28, 2010 21:25:00 GMT -5
The rest of you are not far off. Both barite and calcite show that same type of crystal formation. I have a Hauser Bed geode section with a pink calcite rose and of course everyone knows about the similar barite roses from Oklahoma. The selenite is often associated with the deserts of the southwest....Mel
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Post by jakesrocks on Oct 28, 2010 22:00:34 GMT -5
I've seen the calcite roses. The quickest way to tell the difference between the two is to take a small piece of a crystal and put it in a small amount of vinegar. Calcite will form bubbles.
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Post by jakesrocks on Oct 29, 2010 22:22:12 GMT -5
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