I have a red, translucent stone that is amorphous, exhibits conchoidal fracture, and shows flow patterns.?

Question

The stone weighs about 2 1/2 pounds. When held to the light, it has a beautiful ruby color. It truly looks like obsidian, but I have never seen this color before. It is not mahogany obsidian, but what is it?

Answer 1

Carnelian agate might be the thing. You should describe where you got it and if you know the hardness. Carnelian would be a 7 on the Moh's scale. The fracture sounds right.