Garnet Var. Spessartine & Minor Sanadine Feldspar with Bixbyites with Topaz (Direct Mine source) – Location: Thomas Range Juab Co. Utah. Thumbnail (see photo for more details). Here we have an a great crystal of spessartine garnet along with some small but gemmy colorless sanadine feldspar crystals and Topaz from the Thomas Range. The garnet crystal is well formed and sharp and has a dark reddish-brown color along with a glassy luster. While garnet crystals are fairly widely distributed throughout the entire range euhedral (sharply formed with glassy faces) garnet crystals are relatively rare and seldom exceed ? inch in diameter. The garnet crystals from the Thomas rage are a mixture of almandine and spessartine with a dominance of spessartine.