Natural Mintabie Opal on Sandstone TF2031 lava stone also noted for its quartz

also noted for its quartz and associated minerals

so it should not be displayed in direct sunlight

making it suitable for a variety of lapidary applications

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

Natural Mintabie Opal on Sandstone TF2031 lava stone also noted for its quartzNatural 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