Garnet as gemstones. The gemstone varieties occur in shades of green, red, yellow, and orange. In the US it is known as the birthstone for January. It is the state mineral of Connecticut, New York's gemstone, and star garnet (garnet with rutile asterisms) is the state gemstone of Idaho. Garnet sand is a good abrasive, and a common replacement for silica sand in sand blasting. Alluvial garnet grains which are rounder are more suitable for such blasting treatments. Mixed with very high pressure water, garnet is used to cut steel and other materials in water jets. For water jet cutting, garnet
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