Where are garnets found in the US?

Garnet mines and occurrences are located in 21 States, but the only presently active (2006) mines are in northern Idaho (garnet placers; one mine), southeastern Montana (garnet placers; one mine), and eastern New York (unweathered bedrock; two mines).

Where can you find garnet?

Garnets can also be found in igneous rocks such as granite and basalt. As it is fairly resistant to abrasion and chemical weathering, garnet is often found in sedimentary rocks or material that is highly weathered and where only the hardest materials have been left behind, like mineral sand dunes.