transcendental
spending too much on rocks
Member since June 2014
Posts: 459
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Post by transcendental on Jul 29, 2014 14:40:20 GMT -5
Probably not but that's what came to mind when I picked it up. Couldn't find much info on the stuff thru google, just links about dogs....not much help. The only helpful link I found said it's not really a jasper but an igneous rock, hornblend, feldspar, and quartz that had melted and fused to produce dalmation stone, and that it's found in chihuahua, Mexico. Considering I found this in maine it's prob not dalmation.... However it was in an area that had a huge magma plug under the surface and produced lots of various granites and other igneous rocks (view my other thread in member photos for more info on the area) but I still have no clue beyond igneous rock. What do you guys think or do you know of any way to test it out? Thanks for looking Top and bottom
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Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
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Post by Sabre52 on Jul 29, 2014 15:27:35 GMT -5
Boy that looks quite a bit like Dalmation even to the slightly yellowish areas. Similar geology does create similar rocks after all. I think Dalmation Stone is more rhyolite than jasper. It, to me, seems softer and a bit more difficult to polish than a harder jasper would be....Mel
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Post by deb193redux on Jul 29, 2014 15:43:25 GMT -5
I had heard Dalmatian was actually a granite
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Post by rockpickerforever on Jul 29, 2014 16:35:33 GMT -5
This is a chunk of Dalmation Jasper I picked up beginning of June from my club's silent auction.
While I understand Dalmation Jasper/stone is made from feldspar and quartz (like granite), it just doesn't have that same texture. It is very fine grained, the spots almost look like they've been painted on. Even on a broken edge, there are no crystals visible.
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Post by snowmom on Jul 29, 2014 17:41:01 GMT -5
whatever it is, sounds like it might polish up real good. It is an attractive looking thing.
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transcendental
spending too much on rocks
Member since June 2014
Posts: 459
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Post by transcendental on Jul 29, 2014 19:35:50 GMT -5
This is a chunk of Dalmation Jasper I picked up beginning of June from my club's silent auction.
While I understand Dalmation Jasper/stone is made from feldspar and quartz (like granite), it just doesn't have that same texture. It is very fine grained, the spots almost look like they've been painted on. Even on a broken edge, there are no crystals visible. Yours is more typical of what I've seen dalmation looking like, mine seems to be a wannabe, black spots arent as pronounced and less frequent, red ones are, it has a really smooth texture to it, reminds me of some cherts I've seen. I really have no clue what determines is something is or isnt dalmation tho. Snowmom I picked it up for the day I decide to buy a saw lol. Bet a can get at least one maybe 2 good cabs out of it. It's about the size of a dollar bill and an inch thick.
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Post by deb193redux on Jul 29, 2014 23:12:07 GMT -5
Since "Dalmation" is a trade name, not a geologic term, it is only Dalmation if it comes from the mine in Mexico that brought the stone to market. Similar stone might be found elsewhere. "Jasper is a microcrystalline variety of quartz but the composition of our Dalmatian stone is much more interesting. It is a mixture of minerals and therefore it is a rock. The types of minerals in the rock are those that crystallize from a melt. So, instead of being a jasper, Dalmatian stone is an igneous rock." rocktumbler.com/blog/what-is-dalmatian-stone-it-is-not-a-jasper/Since it is finer grain (rapid cooling), it probably is extrusive, so not a true granite.
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transcendental
spending too much on rocks
Member since June 2014
Posts: 459
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Post by transcendental on Jul 30, 2014 8:22:13 GMT -5
Since "Dalmation" is a trade name, not a geologic term, it is only Dalmation if it comes from the mine in Mexico that brought the stone to market. Similar stone might be found elsewhere. "Jasper is a microcrystalline variety of quartz but the composition of our Dalmatian stone is much more interesting. It is a mixture of minerals and therefore it is a rock. The types of minerals in the rock are those that crystallize from a melt. So, instead of being a jasper, Dalmatian stone is an igneous rock." rocktumbler.com/blog/what-is-dalmatian-stone-it-is-not-a-jasper/Since it is finer grain (rapid cooling), it probably is extrusive, so not a true granite. That's the site I found that I thought was helpful
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Deleted
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Post by Deleted on Aug 10, 2014 17:10:22 GMT -5
food for thought
doesn't "similar to granite but finer grained" = porphyry?
Chemically the same but smaller crystal structure??
Just a thought.
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transcendental
spending too much on rocks
Member since June 2014
Posts: 459
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Post by transcendental on Aug 11, 2014 17:24:28 GMT -5
food for thought doesn't "similar to granite but finer grained" = porphyry? Chemically the same but smaller crystal structure?? Just a thought. Didn't know the name for it, thx for the info
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Deleted
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Post by Deleted on Aug 11, 2014 19:50:50 GMT -5
I dont know for sure it is info! That is why my post was a bit sheepish!
I do know Llanoie is considered porphyry and to me dalmation stone looks the same with different colors.
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transcendental
spending too much on rocks
Member since June 2014
Posts: 459
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Post by transcendental on Aug 11, 2014 20:17:06 GMT -5
I haven't heard that term before so definitely info to me and resulted in more info due to subsequent googling. Couldn't find any info relating dalmation stone to aporphyry. What is llanoie? I couldn't find any info on it
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Mazanec
spending too much on rocks
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Post by Mazanec on Jan 28, 2016 19:22:39 GMT -5
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Deleted
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Post by Deleted on Jan 30, 2016 22:36:53 GMT -5
I dont know for sure it is info! That is why my post was a bit sheepish! I do know Llanoie is considered porphyry and to me dalmation stone looks the same with different colors. Llanoite Typo! transcendental
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