This gem, composed of two intergrown crystals sharing a termination, is a transparent, sky blue color. Classic! The large faces on both sides exhibit superior luster, while the side faces are slightly frosted. When this deposit was discovered in the late 1970's, it arguably produced the world's most beautiful crystals of light blue to rich blue topaz crystals, on and off matrix. GEMMIER In PERSON! 6 x 4.2 x 3.6 cm