The base glass is a beautiful medium dark amber with lots of white swirls that exhibit the, peculiar to Peltier, feathered surface pattern. Commonly refered to as a Peltier Slag, the company itself marketed these marbles as the NATIONAL ONYX. If you look closely at the first and sixth picture, you will see a hairline of black running through the white swirls. I've never seen any color other than white in Peltier slags except, very occaisionally, a line of oxblood. I hesitate to call it that, but what else?
CONDITION: MINT(+) 9.8 The surface is wet and shiny with no sign of wear at all. And, miraculous as it may seem, there are no bubble pops or melted dimples or any other anomaly that I can find, which is nearly miraculous for a Peltier marble, especially a National Onyx.
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Size 15.59mm or 0.613" at the equator.
Click on the first picture for a greatly enlarged view.