jamesp
Cave Dweller
Member since October 2012
Posts: 36,159
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Post by jamesp on Aug 6, 2017 17:11:46 GMT -5
Tell it Walt. Did you freehand it ? Granite ?
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Post by manofglass on Aug 6, 2017 17:13:15 GMT -5
It is a greenish color where the dark color Is
Walt
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Post by pauls on Aug 6, 2017 17:33:53 GMT -5
Lovin this thread and where its going. Lateral thinking running wild here.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,159
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Post by jamesp on Aug 6, 2017 17:46:38 GMT -5
Lovin this thread and where its going. Lateral thinking running wild here. Me too pauls. I want to make spheres and have learned better ways to try. Lots of thought before this thread, have certainly been steered by y'all 's input.
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426
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Post by notjustone on Aug 6, 2017 18:52:14 GMT -5
I have a few I freehanded on the stacked blade grinder in the tumbler right now. What type of rock ? I don't know rock lol. not granite lol.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,159
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Post by jamesp on Aug 6, 2017 19:03:52 GMT -5
I don't know rock lol. not granite lol. Just gonna say, granite may be about half crystalline quartz and Mohs 6 felspar for example. It grinds about 6-10 times faster than good hard agate. Agate is some really slow to grind rock if you are not already aware. It takes some bench time doing agate. Spheres under 3 inches best for free hand shaping. Above that a rock saw should be used on agate unless you can find close to round cobbles of agate. 2-3 inch sphere would be plenty satisfying and great for tumbling. Polish well.
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