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Post by captbob on Aug 8, 2017 16:21:09 GMT -5
Know where it if from?
Amy sage? Any chance it is Tiffany stone?
Cut it open!
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timloco
has rocks in the head
Member since April 2012
Posts: 545
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Post by timloco on Aug 8, 2017 17:00:41 GMT -5
No idea where it's from I got it from a bin of all kinds of different rock for 2 bucks a pound. I'm gonna cut a slab or two from it soon.
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gemfeller
Cave Dweller
Member since June 2011
Posts: 3,801
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Post by gemfeller on Aug 8, 2017 18:21:16 GMT -5
Have you tried a hardness test on the purple stuff? Looks like it could be fluorite to me. Lots of other possibilities.
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Post by coloradocliff on Aug 8, 2017 18:31:36 GMT -5
Only see one picture of one little chip. The other picture isn't showing up Tim. Not enough to even guess. Outside sure looks mossy and cool. Maybe drop a chip in Iron Out and if it doesn't fizz drop the whole thing in for a while to clean off the rind. Sure looks interesting though.
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Post by coloradocliff on Aug 8, 2017 18:33:16 GMT -5
See the slices for sure now. Interesting.
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Aug 8, 2017 18:44:32 GMT -5
I'm echoing gemfeller. Scratch test confirms fluorite.
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Post by fernwood on Aug 8, 2017 18:46:14 GMT -5
Very interesting. Agree that it could be flourite or some type of purple quartz.
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Aug 8, 2017 18:57:49 GMT -5
Very interesting. Agree that it could be flourite or some type of purple quartz. Pixel peep into the crystals. Many cubic corners viable.
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Post by captbob on Aug 8, 2017 22:23:40 GMT -5
My maybe guesses went right out the window with those cuts. Never expected that inside!
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Aug 8, 2017 22:28:37 GMT -5
My maybe guesses went right out the window with those cuts. Never expected that inside! But aren't you a fluorite guy? It's fluorite in matrix... Pending scratch teat
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Post by Garage Rocker on Aug 8, 2017 22:34:26 GMT -5
My maybe guesses went right out the window with those cuts. Never expected that inside! Pending scratch teatnew test?
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Aug 8, 2017 22:51:21 GMT -5
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unclesoska
freely admits to licking rocks
All those jade boulders tossed in search of gold!
Member since February 2011
Posts: 934
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Post by unclesoska on Aug 8, 2017 23:15:27 GMT -5
I've sliced material that looks just like this- it's Lepidolite.
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Aug 9, 2017 8:53:19 GMT -5
I've sliced material that looks just like this- it's Lepidolite. How would we test to differentiate from fluorite? I ask due to cubic crystals visible. Lepidolite has tabular crystals, a form of mica.
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unclesoska
freely admits to licking rocks
All those jade boulders tossed in search of gold!
Member since February 2011
Posts: 934
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Post by unclesoska on Aug 9, 2017 10:48:23 GMT -5
Fluorite is a Moh's 4, and Lepidolite ranges 2.5 to 4, so a scratch test won't be definitive. Fluorite will usually fluoresce under UV, Lepidolite will not. Lepidolite insoluble in acids, fluorite will react in sulfuric acid, creating hydrofluoric acid, WHICH ATTACKS GLASS! Both fuse easily, lepidolite turns flame crimson, fluorite turns flame brick red, color perception being subjective, not a good test unless 2 known samples are available for flame comparison. Cubic crystals would be defining for fluorite, but unless isolated, IMHO could be mistaken for the 6 sided lamellae of lepidolite. Fluorite is heavier than lepidolite, 3.1-3.3 versus 2.8-2.9, so that's a possible puzzle answer. Info in this post extracted from Simon & Schuster's Guide to Rocks and minerals.
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unclesoska
freely admits to licking rocks
All those jade boulders tossed in search of gold!
Member since February 2011
Posts: 934
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Post by unclesoska on Aug 9, 2017 10:51:44 GMT -5
An old timer @ a rock club identified a rock I had as lepidolite. I took his word for it. I took it home and slabbed it, shined up real nice, and I produced a candle holder from it. Looks just like what has been pictured here, so that's how I've based my assumption.
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Post by rockjunquie on Aug 9, 2017 11:11:27 GMT -5
If you're depressed, you could always wear a slab and see if it makes you feel better. Then it would be lepidolite.
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timloco
has rocks in the head
Member since April 2012
Posts: 545
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Post by timloco on Aug 9, 2017 11:17:13 GMT -5
I'll buy lepidolite, the dark parts on the inside kinda have a schiller effect like it's partially metamorphized mica. hardness is 4. White streak. have not measured specific gravity yet.
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