spam reported,busy little sucker.
My mind was telling me it was a longerette not the binocular type.
Chalk has a hardness of 1,travertine is 3.
Most stones can be "hand" carved,opal has a hardness of 5.5 – 6.5and can be easily be shaped in a pie pan with an abrasive stone and sand paper.
Travertine.......
Many stones can have different minerals like Parrot Wing Jasper is a mixture of chrysocolla, jasper, azurite, and quartz.It can be difficult with...
If you check the hardness it might lower the guesses.
Check with your local eyeglass store,they usually have repair kits with different screws at no cost for one screw.
Travertine is fairly soft and a steel knife blade will scratch it,petrified wood is quartz and a steel knife will not scratch it.The pits on the...
Possibly travertine.
Size?
165+ grams
Shaving brushes,paint brushes,hats,coats....
Does it slide off the base? If so see if you can scratch the bottom with your fingernail.
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Close up photos of individual pieces could help.The walrus/seal scrimshaw could be walrus tusk.
Guess they didn't know what sapphires look like........
Looks Mexican with green dyed travertine stone.
How did he test them? Did he use a microscope the see the interior?
100 microns=1/10th of a millimeter .
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