Mexican Cantera Opal Cabochon - Jalisco, Mexico Matrix This beautiful Calcite with Quartz

This beautiful Calcite with Quartz specimen from Fujian

As a semi-translucent variety of chalcedony quartz

Perfect for crystal collectors and enthusiasts alike

Volcano Agate Skull: Hand-Carved & UV Reactive

Mexican Cantera Opal Cabochon - Jalisco, Mexico Matrix This beautiful Calcite with QuartzIve always been fascinated by how certain minerals look when they are left partially embedded in their host rock, and this Mexican Cantera Opal Cabochon is a perfect example of that natural contrast. In Spanish, "Cantera" translates to quarry or stone, which refers to the pinkish tan rhyolite matrix that surrounds the precious opal. Instead of being cut out as a traditional gemstone, these specimens are shaped and polished so that the opal sits like a