Gem Type: Garnet group.
Color: Spessartite garnet is ideochromatic, meaning that it is colored by a fundamental element in its composition. That element is manganese, which produces an orange color. The color may be modified slightly by mixing with Pyrope and Almandine to orange reddish.
Crystal system: (Cubic)
Hardness: 7 - 7.5 Mohs scaleSpecific gravity: 4.12 - 4.28
Refractive index: Very high. 1780-1810.
Deposits: India, Sri Lanka, Madagascar, Madagascar, Australia, Myanmar.