spiritstone
Cave Dweller
Member since August 2014
Posts: 2,061
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Post by spiritstone on Sept 26, 2014 21:53:15 GMT -5
Would anyone know what this crystal formation pertains to for a host? its a heavy stone. Lead Crystal? Picked this up a few weeks back. Thanks.
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Post by glennz01 on Sept 28, 2014 17:48:07 GMT -5
looks like a calcite if those are squares
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Post by mohs on Sept 28, 2014 18:09:38 GMT -5
I'm not sure I understand the question but it looks like baby terminated crystals perhaps calcite as mentioned or even mica of some sort or if metallic perhaps pyrite Ed
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Fossilman
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Member since January 2009
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Post by Fossilman on Sept 28, 2014 19:17:54 GMT -5
Are they on an agate or a quartz rock?
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spiritstone
Cave Dweller
Member since August 2014
Posts: 2,061
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Post by spiritstone on Sept 28, 2014 20:36:54 GMT -5
There is a mixture of perfect squares of crystal with hexagonal quartz crystals. Nothing is soft to be calcite. No metallic shine or color as pyrite cubes show. What I was reading is quartz is a trigonal and hexagonal shaped crystal. So yes , definitely quartz in there. Does quartz also form as cubes? Thats what has me stumped. The whole rock looks as if its made of... river tumbled glass with two distinct bands encircling it, so yes again, I have to say it is mostly quartz for matrix. Thanks for your suggestions.
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spiritstone
Cave Dweller
Member since August 2014
Posts: 2,061
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Post by spiritstone on Sept 28, 2014 22:22:38 GMT -5
A few notes I found on the RTH library. This caught my attention. "rarely Quartz and Hematite." ISOMETRIC SYSTEM Cubes - Metallic luster: Galena; Pyrite. - Nonmetallic luster: Fluorite; Cuprite (at times elongated into capillary forms); Cerargyrite; Halite; Sylvite; Boracite; Pharmacosiderite. Also Percylite; Perovskite. Cube-like forms occur with the following: Apophyllite (tetragonal); Cryolite (monoclinic). Also with the rhombohedral species: Chabazite; Alunite; Calcite; rarely Quartz and Hematite.
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Post by snowmom on Sept 29, 2014 5:44:56 GMT -5
I go back to this page constantly, might be something in here that can help. (looking too) www.quartzpage.de/
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spiritstone
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Member since August 2014
Posts: 2,061
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Post by spiritstone on Sept 29, 2014 11:27:44 GMT -5
I go back to this page constantly, might be something in here that can help. (looking too) www.quartzpage.de/ Great link! I looked at so many and cant seem to find anything similar to it. I keep running into pyrite as metallic cubes and calcite unless it morphed into quartz? Thing is... there is nothing that comes close to the hardness of a 2 anywhere on this piece. The Faden quartz best represents the look, and so does the alpine fissures. Take a look at the last one on the bottom of the page, www.quartzpage.de/gro_text.html Other Growth Forms. The last one has a box shape also mixed in. hmmm Thanks Snowmom, keep u posted when I come across something more.
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vugs
starting to spend too much on rocks
Rockbiter
Member since February 2014
Posts: 225
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Post by vugs on Sept 29, 2014 12:14:12 GMT -5
Maybe Melanophlogite. Heres a link to a specimen that resembles yours.
Melanophlogite
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spiritstone
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Member since August 2014
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Post by spiritstone on Sept 29, 2014 12:50:33 GMT -5
Maybe Melanophlogite. Heres a link to a specimen that resembles yours.
MelanophlogiteI think your correct. What i was reading on it seems to coincide on what I'm looking at. Hardness fits, cubic formation fits. The yellow staining now I see what that might be also. Melanophlogite does form crystals, and attractive ones too; however, the actual symmetry is still in doubt. Individual crystals of melanophlogite appear cubic, but they could just be pseudo-cubic (see boleite). An examination of the formula for melanophlogite (C2H17O5Si46O92) reveals a large amount of SiO2 or silica. It might be tempting to conclude that it is just organically impure quartz, but melanophlogite isn't. If it were quartz, it would have quartz's structure and symmetry, and it definitely does not have these. Have to go back for more. Thanks!
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vugs
starting to spend too much on rocks
Rockbiter
Member since February 2014
Posts: 225
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Post by vugs on Sept 29, 2014 18:11:05 GMT -5
Yea you should definitely go back and get more. Assuming thats what it is, Melanophlogite is a rare find.
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spiritstone
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Member since August 2014
Posts: 2,061
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Post by spiritstone on Sept 30, 2014 8:24:24 GMT -5
Yea you should definitely go back and get more. Assuming thats what it is, Melanophlogite is a rare find. Thats the plan next spring . Snow is on the ground there allready, so hounding for rocks is going to become rather obsolete for a few months. Thanks again.
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Fossilman
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Member since January 2009
Posts: 20,681
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Post by Fossilman on Sept 30, 2014 15:56:05 GMT -5
Yea you should definitely go back and get more. Assuming thats what it is, Melanophlogite is a rare find. Thats the plan next spring . Snow is on the ground there allready, so hounding for rocks is going to become rather obsolete for a few months. Thanks again. Keep that white crap up north too!!! LMAO...We don't want it or like it.. I'll take rain over snow anytime..Thumbs up
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spiritstone
Cave Dweller
Member since August 2014
Posts: 2,061
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Post by spiritstone on Sept 30, 2014 21:54:44 GMT -5
Thats the plan next spring . Snow is on the ground there allready, so hounding for rocks is going to become rather obsolete for a few months. Thanks again. Keep that white crap up north too!!! LMAO...We don't want it or like it.. I'll take rain over snow anytime..Thumbs up LMAO, I dont blame ya. My bones feel the coldness each year a little more.
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