Home › Forums › Specific Discussion › Identification › Volcanic Glass? Olivine? Peridot? Very Heavy, Translucent Stone › It looks like green volcanic
It looks like green volcanic glass to me. My stepfather worked on the Alcova Dam project in Wyoming back in the ’30s. He told me that when they dug the diversion tunnel, it went through a vein of about 10 feet thickness. He still had a piece of the material, and it looked quite like your picture.