Mexican Cantera Opal Cabochon - Jalisco, Mexico Monarch This mineral is composed of

This mineral is composed of iron and sulfur

you'll still get a reaction

To preserve their high polish and prevent dulling

Weight:217g

Mexican Cantera Opal Cabochon - Jalisco, Mexico Monarch This mineral is composed ofIve 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