Dioptase with Calcite Gemstone Carvings Each bead measure approximately 4mm

Each bead measure approximately 4mm in diameter and each strand measures 16 inches in length

The very first stone tools were not created by humans

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 Each bead measure approximately 4mmDioptase 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).