Mexican Silver Sheen Obsidian Lapidary Rough Chunk Volcanic Glass Birdseye Most of these thundereggs were

Most of these thundereggs were dug before the 1970s

Measurements (inches - longest - approx):  4

This one does have a rough cut on one side

Old Vein Crazy Lace has some wild and crazy patterns that make some really unique scenes

Mexican Silver Sheen Obsidian Lapidary Rough Chunk Volcanic Glass Birdseye Most of these thundereggs wereMexican Gold and Silver Sheen Obsidian is arguably one of the best forms of Gold and Silver Sheen Obsidian on the market. This material is mined in Jalisco, Mexico, and is well known for its purity and a high rate of gold sheen. This material cuts and polishes fantastic. Be careful while handling though, obsidian can break sharp. Little flecks of magnetite metal within the Obsidian give this gorgeous shimmering flash of gold or silver within the stone