3.8" Spessartine Garnet, Smoky Quartz & Mica on Feldspar - China

 
 
Here is a beautiful 3.8" spessartine garnet, mica, dark smoky quartz & feldspar association from Fujiang, China. The garnets and smoky quartz remained in pristine condition and formed from a feldspar matrix.

Feldspars are a group of rock-forming tectosilicate minerals. It is also one of the most common minerals on earth, making up nearly 60% of the crust.

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.

Smoky quartz is a grey-brown to black variety of quartz. This common name is derived from from the appearance of smoke within the quartz crystal. Dependent on the location and the chemicals present during formation, smoky quartz can appear opaque black, however it’s typically translucent to some extent. It’s believed that the quartz gains this color from a combination of natural irradiation and aluminum impurities.

Garnets are nesosilicates having the general formula X3Y2(Si O4)3. There are many species of garnet which are pyrope, almandine, spessartine, uvarovite, andradite and grossular (varieties of which are hessonite or cinnamon-stone and tsavorite).

Garnet species are found in many colors including red, orange, yellow, green, purple, brown, blue, black, pink, and colorless, with reddish shades most common.

Spessartine, often mistakenly referred to as spessartite, is a nesosilicate, manganese aluminium garnet species, Mn2+3Al2(SiO4)3. The name is a derivative of Spessart in Bavaria, Germany, the type locality of the mineral.


FOR SALE
$115
DETAILS
SPECIES
Spessartine Garnet, Mica, Quartz var. Smoky & Feldspar
LOCATION
Tongbei, Yunxiao County, Fujiang, China
SIZE
3.8" long, 2.4" wide
CATEGORY
SUB CATEGORY
ITEM
#93641