Ezi zino sterling silver 925 Malachite eilat stone natural Beads 6mm BraceletMalachite is a copper carbonate hydroxide mineral, with the formula Cu2CO3(OH)2. This opaque, green banded mineral crystallizes in the monoclinic crystal system, and most often forms botryoidal, fibrous, or stalagmitic masses, in fractures and spaces, deep underground, where the water table and hydrothermal fluids provide the means for chemical precipitation. Individual crystals are rare but do occur as slender to acicular prisms. Pseudomorphs after more tabular or blocky azurite crystals also occurMaterial: Sterling silver15.0 GRAMAdjustable sizing closure - 6.0 inch/ 8.5inchi send all my items worldwide from israel I send all my items by registered airmail + Insurance Shipping to U.S.A and Europe usually take between 7-21 days.The payment by paypal onlyShipping cost to all buyers 10$