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Post by tkrueger3 on Mar 2, 2011 0:04:19 GMT -5
I know there are certain types of rocks which, when cut, will turn the cutting coolant (water, oil, or some combination) black. Can someone list the varioius types that exhibit this characteristic, please? It might be helpful to some to avoid cutting those types, if we know what they are.
Thanks in advance,
Tom
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rockhound97058
freely admits to licking rocks
Thundereggs - Oregons Official State Rock!
Member since January 2006
Posts: 760
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Post by rockhound97058 on Mar 2, 2011 0:27:34 GMT -5
Hematite - I've seen it red or black water. Psilomelane Apache Chrysocolla - This is a mixture of various minerals. I have seen some of this change the water dirty.
I'm sure there's a list of others for ya as well. But there are some I've had experience with.
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Post by parfive on Mar 2, 2011 1:15:16 GMT -5
Hey, that’s cheating. You’re supposed to learn these lessons the hard way. ;D
Not black, but I think African blue swirlstone is the messiest stuff I’ve cut, as far as gunkin’ up the oil goes.
That’s also why I never gave a second thought to the plaster of paris or cement in the milk carton method. Why put all that extra crap in your oil? There’s plenty off better ways to clamp any rock.
Rich
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Post by Jack, lapidaryrough on Mar 2, 2011 2:05:33 GMT -5
Rich
I to have done the milk carton, i was cutting a bunch of small Montana moss agates. i used the gallon size. muddy tank in the HP-24" saw. and a lot of the material looked like it was cut with a chain saw. from running loose against the blade.
Malachite turns trim saw coolant black, cutting tiger eye in slab saw turn coolant orange. Washing tiger eye in tub turn water orange.
Cutting large Brazilian agate glazes`s the blade and leaves a lot of water in tank, from enhydros.
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Post by Jack, lapidaryrough on Mar 2, 2011 2:06:06 GMT -5
Rich
I to have done the milk carton, i was cutting a bunch of small Montana moss agates. i used the gallon size. muddy tank in the HP-24" saw. and a lot of the material looked like it was cut with a chain saw. from running loose against the blade.
Malachite turns trim saw coolant black, cutting tiger eye in slab saw turn coolant orange. Washing tiger eye in tub turn water orange.
Cutting large Brazilian agate glazes`s the blade and leaves a lot of water in tank, from enhydros.
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drjo
fully equipped rock polisher
Honduran Opal & DIY Nut
Member since May 2008
Posts: 1,581
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Post by drjo on Mar 2, 2011 8:47:02 GMT -5
Jack, when did you start stuttering? ;D
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Post by jakesrocks on Mar 2, 2011 9:03:27 GMT -5
Some of the dirtiest stuff I've cut is Biggs Jasper. Turns the oil a thick medium brown. Had to change the oil in my 16" saw after about a dozen cuts.
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Post by stonesthatrock on Mar 2, 2011 9:22:48 GMT -5
red jasper is another one turns it red. Then there is a lime green and purple serpentine for az. that if you cut it, it looks like an alien threw up in your saw. White stringy things hang down from the hood. Ralph won't cut it unless hes ready to change the oil. There are more but i would have to think about it. mary ann
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Post by tandl on Mar 2, 2011 10:22:32 GMT -5
pyrite,marcasite,limonite turns it black i will still cut them though
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Post by Jack, lapidaryrough on Mar 2, 2011 12:25:50 GMT -5
Jack, when did you start stuttering? ;D Doc, it`s my finger`s they can`t think, an type at the same time
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Post by Donnie's Rocky Treasures on Mar 2, 2011 18:03:18 GMT -5
Apache gold (chalcopyrite) turns the water black, black, black. Sort of a slick, oily looking black & your fingers & nails too. Did I say black, yeah really black!!!
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snuffy
Cave Dweller
Member since May 2009
Posts: 4,319
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Post by snuffy on Mar 2, 2011 20:42:39 GMT -5
Tom, I just cut a couple slabs off a chunk of pyrite the other night and I aint gonna do that no more. Black,black,black.
snuffy
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Post by tkrueger3 on Mar 7, 2011 0:30:15 GMT -5
Well, I gave up today. Everything I cut had lots of scratches on the cut surface, which is unusual for my LS-10. So I once again dismembered the beast (I even remove the motor to lighten the load to where I can lift the box) and cleaned it out. Man, was that stuff gritty! Nasty! Now she's all back together, clean as a whistle, with brand new horse laxative in her! I have a neighbor who works for a vet, who got me 3 gallons of the stuff. I love it!
The big black rock is gonna stay just as it is now - 2 halves of a big black rock! No more of that black grit in my oil!
Tom
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rocpup
spending too much on rocks
Pink Limb Iris
Member since March 2011
Posts: 465
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Post by rocpup on Mar 22, 2011 19:29:39 GMT -5
Most jaspers will discolor your oil very quickly and if you have been cutting rock as long as I have you won't let that bother you. With the price of oil these days I let my saw blade start pumping mud before I change the oil. A good oil will settle out the solids as its life goes. There is some rocks that will promote this settling effect. A couple of days ago my oil was getting a very rich brown. Yesterday I started cutting a white looking geode. I think I may have made maybe three cuts from it. This morning the oil was crystal clear. There is about an inch of sledge in the bottom of the tank. When I find a rock like this I will put it aside just for help with the settling process. I also keep a piece of marble just for this purpose. I use Pella A and the last five gallon pale was $80.17. It just has to last a while. Rocpup
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quartz
Cave Dweller
breakin' rocks in the hot sun
Member since February 2010
Posts: 3,352
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Post by quartz on Mar 22, 2011 20:51:45 GMT -5
Rumor has it that horse laxative makes thundereggs get soft.
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