Ric

Nice, Art. I'd be interested to know what the sides of the lid look like.

Riker cases are the glass-topped pressed cardboard cases that many folks use to display marbles. I'm sure you've seen them. Mainly because Art just showed one. 😀

I found what Steph said very interesting - maybe the geologists are the ones who need to call it something else. I mean, the mineral is not glass, right?

One Vitro and two MKs is my take on it.

Most likely Pelt but I couldn't rule out Kokomo possibities.

I agree with Alley.

I really like the base glass for the first one, Dave!

Rainbos . . .

Nice examples, Dave. I especially like the blue one!

Nice selection, Gladys!

It doesn't look so unusual now - it seemed much darker buried in the pile. Still a nice one though.

That's a pretty marble, Chris. I think that the word "agate" was initially adopted by American marble companies since it was associated with the quality stone marbles from Germany, which were something they wanted to replicate with glass. As for minerals in marbles, gold lutz and mica were used in early German handmades many years ago. I think aventurine is sometimes purposefully produced and sometimes just results from reactions of certain colorants used in he manufacturing process. I am sure others could add more to this discussion.

Nice bunch, William. The dark green one buried near the center of the first photo looks a little different.

Wow, a Liberty with mustard - super nice!

Great examples of Peltier colors!

What size is it?

Good to see you post, Chris - really great photos. The first marble is super nice! The big one is great too- cold roll or not. And I agree that the last one looks different than the others. It may be German while the others are Dutch. But I don't know for sure.

I stand corrected - striped transparent, but not a slag.

Here's a little better shot of my "moon" key ring marble . . .

Nice 🦗!

Thanks, Stephen. Vitros and Kokomos are about the only marbles with cut lines that I actually collect.

Good stuff! Thanks for sharing it.

I've had these two on my key chains for years and years.

I'd consider the German striped transparent a type of slag. And I've seen this sort of "damage" on a number of old marbles. I think it may have been intentionally done with a file or blade of some sort to produce a thumbnail hold so the shooter could get better 'english' on their shots.