Known as the Gem State, Idaho boasts over 240 minerals that have been identified within its borders. The most significant one, though, is its state gem, the star garnet. Star garnets get their name from the four- or six-pointed star that appears to hover upon the surface when they are properly cut and polished. The phenomenon, known as asterism, is caused by rutile (a mineral consisting of titanium dioxide) needle formations within the stone creating a stunning optical display. These gems can only be found in only two places on…
