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How do you test an unknown natural stone?
Thanks for all the replies! I took a little of every body and this is what I ended up doing. I didn't cook the stone but while I was honing two razors from bevel to 8k I heated slowly the stone with tap hot water. Started with warm and in three stages ended with full hot tap water ( about 15 min). This was to bring the temp of the rock slowly so it would not crack.
Then I washed it with soap, water and old tooth brush. Rinsed well and lapped it with a well worn 325, then atoma 1200 (I suspect is a Turingian). Let dry and come to room temperature. Did a scratch test with nail. Took pictures, dry, wet and with slury. Here they are, the one in the wood narrow box, it's supposed to be a dark blue vintage Turingian.
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Then I let the slury dry on top of the stone. Compare smell and tasted them with tongue ? I hope this is not one of those beginners prank! Took a very nice 8k edge, went to the 16k shapton and then water only on stone.
Here are the observations.
Color, texture and hardness appeared the same as the 1" dark Turingian. They both smell like river dirt, with a hint of iron somewhere. The taste on both, was tasteless. The slurry, was the only thing different. The known Turingian slury was very dark grey, giving a bluish hue to the milky slury, the unknown wider stone, was grey, bordering on light grey, giving a milky appearance to the slury.
Took a tpt and a hht test before the stone (after the 16k) and then, after the unknown stone. It felt as it didn't improved or degraded. The shave is tomorrow. I'll let you all know if it's a keeper or a dud, so far it looks promising. Double O
How do you test an unknown natural stone?
Quote:
Originally Posted by
Hirlau
I say it's time to give it a name. :shrug:
"Turingian"? If it walks like a duck, quack like a duck, it's a duck! LOL! Double O