Natural Mintabie Opal on Sandstone TF2031 lava stone This oddball specimen is a

This oddball specimen is a combination of quartz and calcite with a coating of chalcopyrite

so it should not be displayed in direct sunlight

A 20 mile long smoke trail from the fall remained the sky for several hours after impact

making it suitable for a variety of lapidary applications

Originally developed as a zinc ore mine in the late 1960s

Natural Mintabie Opal on Sandstone TF2031 lava stone This oddball specimen is aNatural Mintabie Opal on Sandstone Approx. Dimensions: 2x2x0. 5 inches Approx. Weight: 36. 8 grams Locality: Mintabie, South Australia Mintabie opal comes from the Mintabie opal fields in South Australia, known for producing vibrant, high quality opals ranging from milky white to black, often with striking color flashes and unique patterns like color bars. Mined from silicified sandstone, these opals are prized for their clarity, hardness, and diverse