Star garnet is an unusual form of Garnet. The star effect is due to something called Asterism. The star effect is better known to sapphires and rubies. Star effects in other gemstomes is fairly rare, but can be found in Garnets, Moonstone, Quartz< Spinel, Citrine, Diopside, Emerald, Chrysoberyl and Beryl.
Star garnets are so rare,because to date they've only been found in 2 places in the world. Idaho in the USA and India.
Size: 1/2 to 1 inch