Post by Tonyterner on Sept 5, 2007 14:35:16 GMT -5
I went to the local rock shop the other day and noticed they got in some labradorite. Being a sucker for anything green and shiny I went through the bin and found this piece which had a nice window of color.
Top surface is the colorful side in this pic
I wanted to make some slices on the saw so I cut parallel to the window and voila, no color. Or should I say just a touch of color at one corner. Decided I had already screwed it up so I'd try one more cut in the same plane. No color at all this time.
Based on this did I cut it wrong or does some of this material just not have color? Is it possible that the plane with the color warps through the piece (rock appears to be "layered")? If I did screw up the cut angle will it still turn out fairly well if I tumble it? TIA
I have some labradorite also and am finding it challenging to cut. I want to make necklace pendants out of it and have had to get an assistant to hold the stone up like it will be when worn as a necklace to determine the correct angle to cut, I hope I got it right. I hope that with a very high dome it will have a good flash. good luck on your cutting I think I will need it too
God put his best work in ROCKS. Etsy store, arendsagates
Post by firewalker45 on Sept 5, 2007 18:43:26 GMT -5
I can not speak from experience. I have only bought Labradorite in small pieces or slabs. Costs more but know what I am getting. From what I have read, you cut it right. Like some other rock it is like shooting craps. No way of knowing until you cut it. Daniel
Tony...I've, of course, have never cut ANYTHING! But I did notice a bucket at a rockshop that had Lab in it. Sitting on the very top was a hunk of yuck. It sat in a box that someone had written on...How Not To Cut Labradorite.
I took that to mean...cut it right or ya get crrrrrraaaapppp! Man...that stuffs not cheap you poor man!
liz opportunity is for the taking. Look inside yourself, you'll see. Then go clean up your own backyard...leave my yard to me. rossington collins band.
God of Multiple Parallel Universes Full of Rocks and Apprentice to THE ONE.
You're in luck, I'm am expert on labradorite. A couple of years ago I was at Richardson's Rock Ranch in Oregon. It was too hot to dig thundereggs so I shopped at the rock shop. They had a huge pile of Labradorite that practically glowed when watered down. It had spots of color on all sides so I slabbed it from various directions and ended up with spots of color (if I turned the slabs just right in the direct sunlight). I was so disappointed I sold the whole pan of slabs to someone for practically nothing. My expert advice? Buy a really nice slab already cut so you can see what you are getting. I wondered at the time if the thickness of the rock made it look better than when slabbed.
Sounds like you cut it correctly- but Lab is a tricky little animal- I have some of the massive form (used in countertops and such) and it is a bugger to get just right- As for tumbling the stuff- well being a feldspar it does have a good hardness- but being a fedspar it also will cleave (break) on a plane (basically break in a straight line) so it has to be tumbled alone- with lots of pellets- and lots of luck!!!!! Just work carefully and pay close attention to it and keep your fingers (and toes if you think it will help) crossed!
I can't tell if thats some Gneiss Schist, or that Schist is Gneiss. All I know is don't take it for Granite
God of Multiple Parallel Universes Full of Rocks and Apprentice to THE ONE.
Need to build a basement shop to really start rockin' again
Thanks all for the advise. The labradorite was $10 a pound, which is way more than I have ever spent on a rock before. I at least have the top slab that has a lot of color so its not a complete loss. My wife has already claimed a cab for herself eventhough I haven't gotten anywhere near cabbing it yet. I'll try the rest in the tumbler and see what gives.
Howdy.....I am by no means expert when it comes to labradorite but when I slab I try to keep the saw in the darker material so far I come out all right....Bob Rough face
Exactly! I've cut and cabbed quite a bit of Lab and I have also learned that cutting in the darker areas helps greatly. It's like some of the color (the good blues, purples and greens) resides on or close to the surface of the dark stuff.
I have also found that the color in stone bought at some rock shops and shows are not always the greatest. Their color looks great but is too close to the surface, so it goes away when cut, cabbed or polished.
I try to find pieces with lots of colorful "heels", elbows etc.. sticking out. I cut those off and make many of my cabs from them.
Saw blade also matters, I use a .012 gem blade to cut the lab, it is less abrasive. The coarser blades seem to cause surface fractures, pitting and such. That makes removal of more material necessary to get a good polish, which can result in loss of color.
Also, I use water and very little Lube Cool, for cutting Labradorite. Oils and coolants can soak into the stone and give the appearance of color loss.
I guess I went over my two cents worth, hope that helps.
Post by Tonyterner on Sept 10, 2007 14:54:09 GMT -5
Thanks all. Tom, after reading the link you provided I believe my piece and crystals going everywhich way in most of the rock. I got the first face OK so I should be about 3 or 4 cabs total. Not too bad.
arago: Wait, what? Did I just jump into a super volcano blow in Yellowstone and a tectonic drift discussion? [pours another glass of Cabernet...]
Aug 27, 2014 20:37:03 GMT -5
arago: Like I said, newb is trying to wash off the residue from his first tumbler run.
Aug 27, 2014 20:38:28 GMT -5
arago: Back to the discussion.
Aug 27, 2014 20:38:44 GMT -5
Fossilman: amanda1982....Go to Kingsley North.com,they are full of goodies and its a one stop store for all your tumbling and hounding needs...
Aug 28, 2014 8:54:45 GMT -5
catmandewe: The volcano at yellowstone finally blew?
Aug 28, 2014 15:29:49 GMT -5
rockpickerforever: Tony, if it did, I think you'd already know about it... Maybe next week.
Aug 28, 2014 15:47:51 GMT -5
Fossilman: Na',it just farted......That place has been burpin' for years though...I think we are lucky it has...
Aug 28, 2014 17:07:55 GMT -5
Fossilman: Would love to see what's underneath that place!!!!!!
Aug 28, 2014 17:08:34 GMT -5
nowyo: Just bought an 18 inch Highland Park saw tonight. Oh, woe is me. What will be the next fix for this junkie?
Aug 28, 2014 23:26:20 GMT -5
rockpickerforever: Oh, you got it bad, Russ. Do you get the DTs when you don't get out and cut rocks on a regular basis? Not the worst thing in world. I have shown great self restraint, 10" HP trim saw largest I have. It makes for a good excuse, can't saw those big rocks.
Aug 29, 2014 0:44:13 GMT -5
wampidy: Jean, I think you should call it "don't have to lift those big rocks". My 12 is good for me also. The one big rock that I cut in Tony's saw in Quartzsite was way too much for me.(only 54 lbs) I am thinking motorcycle lift and rolling them in.
Aug 29, 2014 11:02:47 GMT -5
rockpickerforever: Jim, you know what they say about good things coming in small packages? I'd like to think I have every bit as good a chance to find winners in the smalls, and not have to deal with the big ones. Lifting heavies not good for old backs.
Aug 29, 2014 11:30:36 GMT -5
Shotgunner: hmmm.... good to know Jim has a 12" saw. Must remember for future discussions.....
Aug 29, 2014 22:30:25 GMT -5
Shotgunner: Ohhh!!! Russ has an 18"!! wooohooo!!
Aug 29, 2014 22:30:43 GMT -5
nowyo: Yeah, I do. Got it home tonight. It was in the cellar of a farmhouse. Had to mostly disassemble it to get it through the door and up the stairs. The things we do for fun. I'll put it back together tomorrow night. Bet it hasn't been used in 30 yrs.
Aug 29, 2014 23:01:19 GMT -5
Rockoonz: It aint a big rock saw till you measure blade size in feet
Aug 30, 2014 0:02:45 GMT -5
Shotgunner: I did see a 4 foot oil saw recently. Same dude has a 12 foot cable saw....
Aug 30, 2014 11:09:24 GMT -5
wampidy: It ain't a big rock saw till you measure blade cost in thousands could be another way to put it. I can not imagine the cost of a 3 to 4 foot blade. We are talking a circumference of over 9 and 12 feet. That is a whole pile of diamonds.
Aug 30, 2014 16:21:44 GMT -5
Shotgunner: 48" x 0.257" segmented blade = $2700, cutting with biodiesel lasts years - as I am told
Aug 30, 2014 16:38:37 GMT -5
mr.mohs: this shouting reminds me of the $75,000 rock!...you guys remember that?
Aug 30, 2014 19:45:21 GMT -5