Mexican Cantera Opal Cabochon - Jalisco, Mexico silver sheen This is a polished black

This is a polished black tourmaline Freeform

Its unique characteristic is a beautiful

Sierra Mojada Municipality

Shattuckite has a density of 4

Mexican Cantera Opal Cabochon - Jalisco, Mexico silver sheen This is a polished blackIve 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