My statement was fact, everyone else is assuming.
There are no true black glass marbles from the inception till AT LEAST as early as 1936 and that is still not even worth considering due to the processes used to make black glass.
I know, I am the new guy, but I know my math and i know my science.
Buy a cheap 20.00 spectrascope, smash some marbles from the era, cheapies ...or not It will not change my view either way.
True black glass did not exist until the late 1800's. Duran was built around that discovery. That formula was shared with Corning. The formula was patented in 1931.
You guys know how those old machines work, how many ran on pure oxygen with a nitros mix ? Thats what you would need to make black glass, actually black. It's not like agates and sugar, it takes a specific mix of silica,boron,etc and specific thermal reactions.
I am going to leave the topic, it's a chase your tale thing now
I edited the listing to make sure no one felt I was being misleading. I am going to get off my butt and get those images up. The macro lens doesn;t lie
I hope everyone's thanks giving goes well. I am wiped out already from shopping and cleaning and tomorrow is hours upon hours of pie making and precooking a few items as well as soooo much nit pick scrubbing.....I do all the cooking, but the wife does all of the bitching