30PCS Natural Green Amazonite Crystal Tumbled Stones Polished Gemstone Feldspar Mineral Specimen Cab from S. Africa You will get 30pcs of the Green Amazonite Cabochons similar to the one in the listing, the size and the color of the cabochon may slightly vary as well due to the fact that all minerals are different. (Chalcedony Bowl NOT included!) Approximately Size: 36mm x 25mm x 16mm / 1 7/16 x 1 x 5/8 Inches; Approximately Weight: 15-25g / 0.5oz-0.9oz; Chemistry: KAlSi3 O8; Composition: Potassium Aluminum Silicate; Class: Silicates; Subclass: Tectosilicates; Group: Feldspars; Amazonite is a translucent to opaque feldspar gemstone with a pretty green color. It is the greenish variety of the mineral Microcline. Amazonite is named after the Amazon River of South America. There are no Amazonite deposits that exist in the Amazon region, so presumably this stone is named to its resemblance in color to the green of the tropical rainforest. Amazonite soft and attractive color closely resembles nephrite and jadeite. (The above information is provided solely for informational purpose. Kindly note that all stones are offered for decorative purposes only. Please, handle your stones with great care, do not grind or crumble them, do not dip or add them into your food or drink, do not use any parts of them in any elixirs, potions, lotions etc. Always make sure you wash your hands before and after working with your crystals.)