Sally Knepper Jechura

Thank you kindly for your time / response. Much appreciated.

Hello, I am new here. I bought an old bag of marbles at a Chicago flea yesterday. I was intrigued by this rather large one. It appears to be old. The surface is odd to me, as you can see from the photos. It is not damaged, it was made this way - or it occurred over time. It is translucent amber color. About 1 3/8" in diameter on my rule (couldn't locate my calipers this morning), and weighs over 2 ounces (60 grams). I know about a lot of things, but not marbles. Thank you in advance for any thoughts on this piece.