pezzottait
off to a rocking start
Member since March 2011
Posts: 23
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Post by pezzottait on Feb 4, 2013 13:33:46 GMT -5
Hello everyone!
I have a question to wonderstone - hickoryite and hickory jasper:
Are they all the same mineral (rhyolite) or are there differences? If yes, how can I distinguish between?
pezzottait
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Post by gingerkid on Feb 4, 2013 13:45:27 GMT -5
Hi, pezzottait! I think there are geologic differences in the names and patterns of the rhyolite. Hope someone will share more with us.
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Post by deb193redux on Feb 4, 2013 13:48:00 GMT -5
I don't know if it is just degree of silification, or if there are geographic difference. But in my experience hicoryite (aka hickory jasper) is much harder and less porous.
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Sabre52
Cave Dweller 
Me and my gal, Rosie
Member since August 2005
Posts: 20,492
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Post by Sabre52 on Feb 4, 2013 21:56:15 GMT -5
I think all are rhyolite with Liesgang lines. The names are just trade names or common names awarded various varieties, color patterns etc.. So far as I know, all the forms vary in silicification and porosity even within a type. Hickoryite though tends to be used for a rather fine grained form out of Mexico that shows banding in various shades of maroon and gold. The jasper designation for these materials is to me a misnomer but in the trades is often used for the types very high in silica content which will take a good polish....Mel
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metalsmith
Cave Dweller
Member since October 2012
Posts: 1,537
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Post by metalsmith on Feb 7, 2013 14:57:05 GMT -5
its a banded rhyolite. Hickoryite is a commercial / trade name ~ misnomer. A good looking rock, but with a notoriety for being 'hard'
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Post by mohs on Feb 7, 2013 21:53:08 GMT -5
 heart of hickoryite it was tightly woved packed fine grained notoriously hard stone heart Ed |
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Post by gingerkid on Feb 8, 2013 17:19:54 GMT -5
Thanks for y'alls explanation of the differences.  ;D Rockin' heart, Ed!! |
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Post by NM Stone Supply on Feb 11, 2013 19:16:25 GMT -5
Hickoryite, wonderstone, solar flare jasper are all just trade names. They are all rhyolites. I own the candy rock rhyolite claim in NM. Here is some of the stuff we mine. Some areas have better stone with more silica that polishes like glass.   |
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Post by cpdad on Feb 12, 2013 20:57:21 GMT -5
i have someone asking for a pendant of apache sage rhyolite...is there another trade name...or just dendritic rhyolite...kev.
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Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,492
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Post by Sabre52 on Feb 12, 2013 22:44:45 GMT -5
Kev, Apache Sage is another New Mexico rhyolite pretty much in the picture jasper category and often sold as such. It often has nice pictures and dendrites along the edge and tends to be in reds and sort of cream colors. Varies a lot in silica content and some examples are a booger to polish while others polish like glass. Probably one of the more expensive rhyolite types on the market and the better the pictures and dendrites and the more fine grained, the more expensive it can be. If you can pick up oil free slabs, water beads up really well in the high silica examples and will soak up a bit in the others...Mel
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Post by NM Stone Supply on Feb 13, 2013 10:33:33 GMT -5
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Post by cpdad on Feb 15, 2013 20:05:17 GMT -5
thanks mel...appreciate the info....jason sending p.m....kev.
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