Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,487
|
Post by Sabre52 on Jun 29, 2006 9:48:28 GMT -5
Howdy, Yesterday I was going through some slabs and found one of my Llanoite slabs and it reminded me of a question I wanted to ask the group. My Sinkankas book says the blue inclusions are quartz or opal-type material and that's what I've always heard from other rock folks too. However, out in the sun, these inclusions looked like they were showing shiller flash just like Labradorite. Opal and quartz do not, to my knowledge, show shiller. Have any of you heard anything about the nature of these inclusions or testing showing what they are. To me they appear to be crystalline feldspar and not quartz in nature at all....mel
|
|
stefan
Cave Dweller
Member since January 2005
Posts: 14,113
|
Post by stefan on Jun 29, 2006 11:50:45 GMT -5
Here is what I found so far- uts.cc.utexas.edu/~rmr/llanite.htmlcould the shiller your seeing be coming off the brown Feldspar- or perhapes the quartz is cleaved along the plane and your picking up flash from that? I know I just got a chunk of stuff from Redwoods Rock (cal) that must be that Lavarite (sp) stuff- the shiller flash is so Stunning it almost blocks out the rest of the matrix!!!
|
|
|
Post by gemkoi on Jun 29, 2006 14:04:56 GMT -5
All Quartz can produce moons and stars. When the cutting is done along the "C' Axis. Or often is very minimal to the naked eye. But in some Rulitated Quartz i cut recenty, both produce a sheen similar to low grade moonstone.
|
|
Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,487
|
Post by Sabre52 on Jun 29, 2006 14:49:23 GMT -5
Thanks much gang. Looks like quartz is the consensus but in dang the hunk I have the flash changes with orientation and looks just like the shiller effect in that lanarkite that they use for countertops etc. Real pretty stuff anyway.....mel
|
|
rollingstone
starting to spend too much on rocks
Member since July 2009
Posts: 236
|
Post by rollingstone on Jun 29, 2006 16:28:27 GMT -5
In that link Stefan posted, if you scroll down to the recent work by Zolensky and others, it mentions that the chatoyance may be due to reflection off platy ilmenite crystals that form inclusions in the quartz. If these were oriented in one direction, that could explain why you see a shiller effect at specific orientations. A thought anyway.
|
|
offbeat
no posts
Member since May 2010
Posts: 0
|
Post by offbeat on Jun 29, 2006 17:12:45 GMT -5
I worked up a couple of pieces of it last week Mel. I enjoyed working with it. Kinda soft, but nice. Seemed to undercut or pull the softer material around the pieces of quartz though. I found that if I went a little easy on it with the wheels it helped. Good luck, Bill
|
|
Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,487
|
Post by Sabre52 on Jun 29, 2006 18:15:18 GMT -5
Don: I'm sure that's the right explanation esp if the blue spots are harder like Bill says.
Bill: Been messing around with cabbing some softer stones lately and trying to work up nerve to sacrifice my only llanoite slab. I had a beautiful boulder I got in Texas and fooishly gave it to a sphere maker buddy to cut a sphere from and give me the cutoffs for cabbing. cause it was too big for my saw. (he has a 36 incher!)Haven't heard from him since *sigh*. Guess I've got an excuse for another Texas trip huh?....mel
|
|
offbeat
no posts
Member since May 2010
Posts: 0
|
Post by offbeat on Jun 29, 2006 20:29:43 GMT -5
Hey Mel, you never need to list an excuse here to go rockhounding!! We are at the oposite end of that yard stick. You are more likely to have to have an excuse to NOT go hounding here!!
Let me see if I can find the box Matt (tigertex) sent me, I just might have some more Llanoite that I can send your way to play with if you would be interested. I'll take a peak tomorrow and send a pm. Bill
|
|
Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,487
|
Post by Sabre52 on Jun 29, 2006 21:27:20 GMT -5
Thanks for the offer Bill but you'd better save your rocks for some of the folks who are not as fortunate as I am. I'm going on a campout and rockhunt for Cambria Jasper the weekend after the fourth and will probably see the guy who has my boulder. I'll see if I can't twist his arm a bit to hurry up and put that rock in his giant drop saw so I can get my share *S* He's also got a 70# hunk of rhyolite to sphere and return the leavings too so I'm real interested in catching up with him...mel
|
|
Alien Jake
off to a rocking start
Member since December 2014
Posts: 22
|
Post by Alien Jake on Dec 7, 2014 22:27:17 GMT -5
I am in Llano pretty often so I can get some for whoever wants it at anytime. I just would like some tips on how to get a good piece. I actually got some today. I just took a sledge hammer and busted some off of the out cropping. Is there a better way? I got some palm sized pieces that I busted off that is not weathered at all. I would like to get bigger pieces that aren't weathered.
|
|
Fossilman
Cave Dweller
Member since January 2009
Posts: 20,709
|
Post by Fossilman on Dec 8, 2014 12:04:58 GMT -5
Wow,nice looking stuff,never seen nor heard of it before......I bet it slabs great!
|
|
Deleted
Deleted Member
Member since January 1970
Posts: 0
|
Post by Deleted on Dec 8, 2014 14:08:36 GMT -5
I made a couple spheres of llanoite a while back. Beauty is in the eye of the beholder. Hey Jake, are you some sort of sorcerer??
|
|
Alien Jake
off to a rocking start
Member since December 2014
Posts: 22
|
Post by Alien Jake on Dec 8, 2014 21:34:01 GMT -5
hahahahah I just did a search on the forum cause I just heard about the stuff last week. Sorry lol
|
|
Deleted
Deleted Member
Member since January 1970
Posts: 0
|
Post by Deleted on Dec 8, 2014 21:43:54 GMT -5
Now that's some funny sh€%t
|
|