6.2" Quartz Crystals with Bladed Hematite - Lechang Mine, China

This is a cluster hematite encrusted quartz that was collected from the Lechang Mine in Guangdong, China. The outermost layer of most of the quartz crystals is red-orange in color. There are clusters of bladed hematite formations (rosettes) at the base of the crystals.

Hematite is a fairly common mineral, typically responsible for the red-brown colorations found in other minerals and rocks. Its chemical composition 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.

Quartz is the name given to silicon dioxide (SiO2) and is the second most abundant mineral in the Earth's crust. Quartz crystals generally grow in silica-rich environments--usually igneous rocks or hydrothermal environments like geothermal waters--at temperatures between 100°C and 450°C, and usually under very high pressure. In either case, crystals will precipitate as temperatures cool, just as ice gradually forms when water freezes. Quartz veins are formed when open fissures are filled with hot water during the closing stages of mountain formation: these veins can be hundreds of millions of years old.

Quartz & Hematite
Lechang Mine, Shaoguan, Guangdong, China
6.2 x 4.9 x 3.1", longest crystal 2.7"