Copper Opal One of the most widely

One of the most widely recognized and unmistakable minerals

Pure fluorite is clear

from the Upper Silurian age

from the Cambrian age

or chemical cleaning agent

Copper Opal One of the most widelyA widespread and industrially important mineral, copper has been used by humans as ornamentation, tools, and as a precious metal for thousands of years. The word copper originates from the latin for the island of Cyprus, where early very productive copper mines supplied much of the ancient world with the material. Copper is a so called native metal, which means it naturally occurs in its metallic form. Natural copper is relatively soft and often found