A very rare golden-yellow gem from Russia. If at all, it is often only tiny crystals that are found. A stone for the ambitious connoisseur.
Formula: (Mg, Fe) 9(SiO4)4(F,OH)2
Hardness: 6 – 6.5
Density: 3.18 – 3.35 g/cm3
Refractive Index: 1.544 – 1.553 DR: 0.024 – 0.039
Color:
Yellow, yellow-brown, brownish-orange, red-brown
Countries of Origin: Russia, Tadzhikistan