3.9" Andradite Garnet Cluster with Hedenbergite - Inner Mongolia

This 3.9" wide specimen contains attractive, black andradite garnets (Melanite) and a small amount of hedenbergite along one edge. It was collected from Chifeng City in Inner Mongolia, China. Tiny apophyllite crystals can also be found scattered along what could be considered the underside of this specimen.

Andradite is a species of the garnet group, and although not as well known as some other types of garnets such as almandine or pyrope, it is the most lustrous. There are three varieties of andradite which include melanite (black garnets), topazolite (yellow garnets) and demantoid (green garnets). It occurs in skarns developed in contact metamorphosed impure limestones or calcic igneous rocks; in chlorite schists, serpentinites and in alkalic igneous rocks (typically titaniferous).

Garnets are nesosilicates having the general formula X3Y2(SiO4)3. There are many species of garnet which include pyrope, almandine, spessartine, uvarovite, andradite and grossular (varieties of which are hessonite, cinnamon-stone and tsavorite). Garnets are found in a wide variety of colors including red, orange, yellow, green, purple, brown, blue, black, pink, and colorless, with reddish shades being the most common.


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DETAILS
SPECIES
Andradite var Melanite, Apophyllite & Hedenbergite
LOCATION
Hexigten Banner, Chifeng City, Inner Mongolia, China
SIZE
3.9 x 2.2"
CATEGORY
SUB CATEGORY
ITEM
#182839