Mystery Rhyolite Slab - Thunderegg Bed Material cabochon rough Mexico • Origin: Green River Formation

• Origin: Green River Formation

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displaying white void-filled formations that resemble peanuts throughout

Brazilian Agate has a very high silica content

Mystery Rhyolite Slab - Thunderegg Bed Material cabochon rough Mexico • Origin: Green River FormationMystery Rhyolite Slab Thunderegg Bed Pattern Old Stock Unknown Origin This stunning old stock rhyolite slab came from a collection of unknown origin. The material resembles the type of rhyolite found near thunderegg beds, suggesting it may come from a volcanic region known for thunderegg production. It should cab nicely and produce some attractive cabochons with good lapidary potential. SPECIFICATIONS Material: Natural Rhyolite Dimensions: 87mm x 82mm