barclay
has rocks in the head
Lowly Padawan of rocks
Member since November 2011
Posts: 510
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Post by barclay on Aug 31, 2013 14:50:28 GMT -5
A couple of cabs from the new material I got on vacation. I am not confident of the name of the second piece since the seller had two different looking rocks in this bin. If someone has a better name of this stuff I am game. Ocean Jasper Firecracker jasper
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Post by rockpickerforever on Aug 31, 2013 15:06:59 GMT -5
Barclay, that second one looks like llanoite. Nice work with them!
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Post by deb193redux on Aug 31, 2013 15:28:24 GMT -5
yes, llanoite
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QuailRiver
fully equipped rock polisher
Member since May 2008
Posts: 1,634
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Post by QuailRiver on Aug 31, 2013 17:48:05 GMT -5
I believe it's spelled Llanite. No "o". Nice cabs though!
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sheltie
freely admits to licking rocks
Member since January 2012
Posts: 982
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Post by sheltie on Aug 31, 2013 18:15:43 GMT -5
I disagree about the llanite (which comes from an area nine or so miles north of the BEST BBQ in TX - Coopers in Llano). The llanite from that particular area doesn't have the red in it as seen in the pictures as far as I know. Whatever it is, it is very pretty. The important aspect to remember here is the BBQ.
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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 Aug 31, 2013 18:54:29 GMT -5
*L* I drive by there quite often and I've heard it called llanoite after the town of Llano, TX and llanite. Not sure which is correct. What I've seen is pretty variable with the buried material being slightly different in color than the weathered surface stuff. I do believe there is a similar material from South America but they look so much alike to me I don't think I could tell a variant of one from a variant of the other. I'd not be afraid to call the example shown llanoite/llanite. I always go to Dickies or Billies in Kerrville for BBQ but love the burgers in Stonewalls in LLano....Mel
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barclay
has rocks in the head
Lowly Padawan of rocks
Member since November 2011
Posts: 510
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Post by barclay on Aug 31, 2013 21:07:08 GMT -5
Our friends at Wikipedia seem to go with Llanite. Here is what they say, Llanite is a hypabyssally intruded rhyolite with phenocrysts of microcline and euhedral quartz. The quartz crystals are blue hexagonal bipyramids. The unusual blue coloration of the quartz is thought to be due to ilmenite inclusions.[1] It is named after Llano County, Texas, the only place where it is found (according to locals; however, geologists have identified other locations where this rock may be found, according to Robert Reed.[2]) A dike of llanite crops out on Texas State Highway 16 about 9 miles north of the town of Llano.[3] An outcrop of llanite can be found at 30°53'25.77"N 98°39'30.57"W.
Llanite is very strong, with a crushing strength of 37,800 lb/in2 or 26,577,180 kg/m2.[4]
Modal mineralogy of llanite mode:[5] quartz - 34.6% microcline - 27.8% plagioclase - 27.9% biotite - 8.6% fluorite - 1.0% apatite - 0.13% magnetite - trace ilmenite - trace zircon - trace
Their pics resemble what I have. This works out because I was looking for neat local minerals on the trip.
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turnedstone
freely admits to licking rocks
Member since January 2006
Posts: 766
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Post by turnedstone on Aug 31, 2013 23:06:50 GMT -5
I seen some 2 years ago that the guy said he dug in north Carolina looked dead on my slab that I had from llano Texas. Nice cabs, I have never seen it with the dark black in it though. I like the O.J. cab nice and orby. George
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Post by rockjunquie on Sept 1, 2013 7:54:28 GMT -5
Nice! I'm gonna add my 2 cents... I had some opal in feldspar from Brazil, I think, that looks like llanoite, too.
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QuailRiver
fully equipped rock polisher
Member since May 2008
Posts: 1,634
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Post by QuailRiver on Sept 2, 2013 21:43:24 GMT -5
I have had a good bit of this material from the main road-cut outcrop collected over the last 40 years. The reds and blues have varied in intensity in different parts of the dyke. When the reds and blues "pop" it's a very pretty lapidary material! Here is a link to a University of Texas' page about Texas Llanite. uts.cc.utexas.edu/~rmr/llanite.html
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Post by rockpickerforever on Sept 2, 2013 22:35:00 GMT -5
I think it was llano-ite, long before they anyone started calling it llanite. You know, after the town of Llano? Makes sense to me. Why do folks always have to go screwing around with a good thing, LOL!?
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ash
spending too much on rocks
Prairieville, Louisiana
Member since July 2012
Posts: 361
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Post by ash on Sept 3, 2013 0:55:29 GMT -5
Nice cabs. Does the spelling really matter that much? I would not be surprised if someone out there is calling this stuff something completely different anyhow. llol
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Roger
fully equipped rock polisher
Member since January 2013
Posts: 1,487
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Post by Roger on Sept 3, 2013 6:25:39 GMT -5
I always called it "granite", but then most of what I cab I still call "rocks" Nice cabs!
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barclay
has rocks in the head
Lowly Padawan of rocks
Member since November 2011
Posts: 510
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Post by barclay on Sept 3, 2013 8:13:00 GMT -5
A rock by any other name would still smell....like dirt
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Post by rockpickerforever on Sept 3, 2013 8:14:19 GMT -5
Ya got that right, Barclay!
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Post by pghram on Sept 3, 2013 10:09:27 GMT -5
They are both very nice and I really like the oval shapes you gave them.
Rich
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