Thread: Escher

This is the only labelled 'grun' (green) Escher I've ever seen. A member here had it on the bay. I don't recall his name. This was a few years ago.

The color labels aren't so much absolute as relative. The labels describe the stones' relative appearances vs. each other more than they do the absolute color - basically shades of gray. So a dark blue will look more like a bluish blackish gray, a blue green will look like a slightly greener and lighter shade of that gray, and a yellow green will look even a lighter greenish gray. Peter had a PDF showing the different variations floating around somewhere.

Today I received my Escher .

This one is an old Escher and it is Green.
It took an age to lap and it did my back in . I used 600 grit paper on the sides and bottom . Just to give me a fresh surface to hold as I am the new owner
I slightly bevelled every edge with a DMT plate and lapped the top with the Shapton Diamond plate. The stone was the opposite of dished out . The middle was proud which corresponded with the arched underside.

When it arrived there were zero sparkles and it was just pure matt but after lapping and holding it at angles under my bedroom light bulb I can get some tiny reflective particles . Not like the blue one but there are some their .

I've taken some pictures with my microscope showing both stones and the edge after 50 laps on the Green. The Green stone did auto slurry.
Before that I did a few laps 8/16k Shapton to start afresh .
Last week I shaved off 30 laps on the blue and it was an amazing shave.



Green Escher

Blue Escher

Shapton 16k

Green Escher.. Looks the same as the blue did under scope.