first time trying to identify marbles

[Ponjong]

Only just dabbling in the world of marbles, and thought I'd try to ID a couple that I have on hand.

Unfortunately I don't have any accurate way of measuring, hence the cat's eyes for reference! one standard size, and one shooter.

The blue marble doesn't appear to be glass, but rather stone of some kind. It is smooth, but definitely not as smooth as my glass marbles, nor as rounded. It is entirely opaque. Grey spot in the third image is a rough patch of damage. In the fourth image, he appears a bit shocked. 😱

Green marble has a translucent base and a large mostly-opaque yellow patch. As seen in the third image of it, the inside has many bubbles. It also has quite a lot of faint bands/streaks inside, though I don't think those are as visible in these pictures. I believe it to be at least somewhat old, as it has notable wear. Also, despite it appearing green and glowing green when backlit, the base takes on an almost bluish color when shone on with a light from above.

All help is appreciated, it can be tough trying to track down marbles on various identification sites, so I figured I'd try here.

[Steph]

Welcome.  The blue marble is ceramic.  It's called a Bennington. It was made in Germany between about 1850 and 1930.  

Might need more views of the yellow and green.  My first thought is a Peltier patch. 

[Ponjong]

Interesting, I had heard of the Benningtons but hadn't looked into them.

Yeah I had thought the green one resembled a few examples of Peltiers I saw online, but wasn't sure. I may attempt to get some better angles on it.

Thanks!