jimtawes
off to a rocking start
Member since April 2017
Posts: 11 
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Post by jimtawes on Jan 24, 2018 10:49:11 GMT -5
Gentlmen (andladies) once again I need advice, I have been trying to slab a 3lb pc of Malachite. I have turned 90 degrees and both ways it crumbles. my saw seems tuned ok what am i doing wrong, Thanks Jim Tawes
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Post by johnjsgems on Jan 24, 2018 13:32:16 GMT -5
Sounds like it needs to be stabilized first.
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Post by vegasjames on Jan 24, 2018 16:18:09 GMT -5
I have found that rocks some people said crumble on them I have had no problem with. But I generally use a thin blade on a trim saw and don't force the rock. Thicker blades, especially if they is any warping I have found tend to cause crumbling when cutting.
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jimtawes
off to a rocking start
Member since April 2017
Posts: 11
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Post by jimtawes on Jan 24, 2018 18:33:02 GMT -5
thanks everyone
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Dr DG
fully equipped rock polisher
Gone Fishing
Member since April 2005
Posts: 1,848
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Post by Dr DG on Jan 24, 2018 18:40:06 GMT -5
post a photo of the stone
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QuailRiver
fully equipped rock polisher
Member since May 2008
Posts: 1,640
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Post by QuailRiver on Jan 24, 2018 21:30:25 GMT -5
Some pieces of Malachite are just not solid enough for cutting and will separate at the banding seams. I had some Zaire material back in the late 70s that a couple of pieces tended to separate when slabbing. You can try stabilizing it as John suggested or you can tumble the crumbled pieces.
Larry C.
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