2.3" Quartz and Calcite Crystal Association - Mexico

 
This specimen contains an association of quartz crystals and sharp calcite crystals, collected from Mexico. One half of the specimen looks to have been blasted with a natural, unknown micro-crystal mineralization.

Silicon Dioxide, also know 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.

Hematite is a fairly common mineral, typically responsible for the red-brown coloration that can be found in other minerals and rocks. The chemical composition of hematite is Fe2O3, occasionally containing small amounts of titanium (variable formula (Fe,Ti)2O3). Much of the time, non-crystalline hematite specimens are the result of a transformation from limonite following loss of water.
DETAILS
SPECIES
Quartz & Calcite
LOCATION
Mexico
SIZE
2.3" wide
CATEGORY
ITEM
#71951