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Help identify material of sharpening stone

0 votes

Curious if you guys have any idea what this material specifically is. These are sold commercially as a final polishing stone for razor blades and fine instruments. It's not novaculite. The best way to describe the way it feels is like incredibly hard, waxy glass covered in a fine layer of corn starch. I thought it may be some form of jasper. These come from Arizona in the middle of nowhere. Thanks for your help.-Keith

asked Sep 29, 2015 by kcb5150 (120 points)

2 Answers

0 votes
My best guess would be obsidian or flint from the conchoidal fractures in the second frame.
answered Oct 2, 2015 by Weasel (58,070 points)
0 votes
Any way you can get any additional information or properties from the supplier?
answered Nov 11, 2015 by hershel (51,840 points)