Dioptase with Calcite Gemstone Carvings the distinctive pattern of the

the distinctive pattern of the six-sided coral fossil emerges

Quartz occurs in crystalline masses

spindle-shaped fossils have surfaces marked by weak spiral lines in a helix

Each strand measures 15 inches in length

Crystalline Gold is purchased not for its spot market value but for its rarity

Dioptase with Calcite Gemstone Carvings the distinctive pattern of theDioptase 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).