Which are the only two places in the world with significant deposits of "star garnets"?

Garnets are a group of silicate minerals that have been used since the Bronze Age as gemstones and abrasives. The word "garnet" comes from the 14th‑century Middle English word "gernet" meaning "dark red". All species of garnets possess similar physical properties and crystal forms, but differ in chemical composition. "Star garnets" got the name from the unique property to display a reflection like a four or six pointed star.

There are only two places in the world where you can find star garnets, which are northern India and the Idaho Panhandle National Forests. The star garnet was designated the official state stone or gem of Idaho in 1967.

Cut and polished, the star garnet is an attractive burgundy-colored jewel worth $10 to $125 a carat.