4.6" Calcite Perimorph with Quartz and Pyrolusite - Diamond Hill, SC

Much of this crystal cluster from Diamond Hill, South Carolina, is covered in a thin aggregation of quartz that has coated the calcite crystals. A natural iron and manganese oxide coating gives the crystals their black and orange coloring. There are botryoidal formations of pyrolusite that encrust some parts of the specimen.

Comes with an acrylic display stand.

The Diamond Hill Mine is located in the southern portion of the Appalachian Mountains, in South Carolina. Erosion over millions of years, exposed this 3 acre spot of mountain that some of the widest varieties of quartz variations in the world, come out of. Quartz variations such as amethyst, smoky, skeletal(elestial), milky, phantomed, iron and manganese oxide coated, and even aura quartz are know to have been deposited here through silica-rich hydrothermal processes. Other minerals including beryl, epidote, and garnet are known to come out of this location as well.

Silicon Dioxide, also known as SiO2 or Quartz, is the second most abundant mineral in the Earth's crust. Quartz crystals generally grow in silica-rich, hot watery solutions called hydrothermal environments, at temperatures between 100°C and 450°C, and usually under very high pressure. Quartz veins are formed when open fissures are filled with hot water during the closing stages of mountains forming, and can be hundreds of millions of years old.

Pyrolusite is a mineral consisting of manganese dioxide (MnO2) and is important as an ore of manganese. It has a silver, metallic luster, a black or bluish-black streak, and readily soils the fingers. It commonly is found in finely packed fibrous, acicular and radial forms composed of very fine needles or fibers.
Quartz, Calcite & Pyrolusite
Diamond Hill, South Carolina
4.6" long, 3.6" wide