Large Dioptase crystals in a cluster formation. Dioptase is known for this vivid, blue-green hue. This specimen has been glued to an acrylic stand for easy display.
Measurements (without stand): ~1-1/4" tall x 1-1/4" wide
Location: Sanda, Kimbedi, D.R.O.C
Dioptase crystals are emerald green and translucent. The mineral got its name from the Greek words for "to see" and "through" because of the ability to see internal cleavage planes of the small crystals. The mineral forms in rhombohedral crystals (usually less than 1cm in size) with a chemical composition of CuSiO3 (H2O).