Tsavorite garnet is a type of grossularite garnet, which a subfamily containing calcium and aluminum attached to oxidized silica. The most valuable of this family is tsavorite garnet; which is vivid bluish green to green and medium to medium dark. Tsavorite garnet, like many fine quality emeralds and chrome tourmaline, gets its intense green color from vanadium. Much like ruby and pink sapphire, tsavorite garnet must be dark enough in order to qualify as tsavorite. If a tsavorite garnet is too light in color it is labeled a green grossularite garnet but cannot be sold as tsavorite garnet and will be of much lesser value.
Tsavorite garnet is often found in large chunks that can weigh several kilograms however, pieces of that size are typically highly fractured and therefore stones cut from them typically only measure a few millimeters in diameter. For this reason stones less than one carat are readily available. Tsavorite garnets over 1 carat are much rarer and sell at a premium.
While small tsavorite garnets tend to be free of inclusions, larger stones may have some eye visible inclusions. Due to the rarity of large tsavorite garnets, cutters focus their efforts more on removing as little material as possible instead of attempting to cut away inclusions. Tsavorite is found predominately in Tanzania, Kenya, and Madagascar. Tsavorite garnet is a 7-7.5 on the Mohs hardness scale meaning it can hold up fairly well to wear and tear stones in rings are subjected to on a daily basis but may occasionally need to be re-polished.