Garnet shades of green, beige, brown, gray, and blue, but in incandescent light, they appear a reddish or purplish/pink color. This is the rarest type of garnet. Because of its color-changing quality, this kind of garnet resembles Alexandrite. Andradite is a calcium-iron garnet, CaFe(SiO), is of variable composition and may be red, yellow, brown, green or black. The recognized varieties are topazolite (yellow or green), demantoid (green) and melanite (black). Andradite is found both in deep-seated igneous rocks like syenite as well as serpentines, schists, and crystalline limestone. Demantoid has been called the "emerald of the Urals" from its occurrence there,
Garnet Valley, Pennsylvania the zip code "city names" are often confused with actual municipal names. As of July 1, 2009, Garnet Valley was removed from zip code 19061 and assigned to a new zip code, 19060. Although the community name is derived from the Garnet Valley School District, the district's headquarters are not within the Garnet Valley ZIP code. The district's address is in Glen Mills, Pennsylvania 19342. The community name is derived from the Garnet mines established in Bethel Township by Herman Behr & Co. of New York in 1879. The mine operated until 1912. Garnet Valley, Pennsylvania Garnet Valley is an