CHI143jr Chinese Agate, Traditional Mine Coyamito Agates The chemical formula for quartz

The chemical formula for quartz is SiO4

All of these have a hardness between 6 - 7

These flats are "A" grade Amethyst with the deepest purple coloring

DES584tr Deschutes Jasper Slab Specimen is a polished slab of Deschutes Jasper featuring the signature tan

CHI143jr Chinese Agate, Traditional Mine Coyamito Agates The chemical formula for quartzThis is a polished specimen featuring yellow, orange, and red agate and a crystal center. 5. 7 cm x 5. 5 cm 0. 28 lbs Agates from the Traditional Mine generally have a gray exterior with red, yellow, orange, pink, or purple agate interior. A quartz center is also common. These agates make for great carvings and specimens and fetch a high price as a result. The mines have been closed since 2016 and agate collecting has been prohibited, so any rough or