HC Set: 63mm Rhodonite Sphere with Manganese Oxide Dendrites Black Pink Crystal Decor Ball Natural Mineral Polished Stone + One Polished Mahogany Obsidian Cabochon from Peru You will receive exactly this Rhodonite Sphere - 63mm / 2 1/2 Inches Diameter; 480g / 16.9 oz / 1.1 lb (see photo, stand not included)! In additional, you will get one of the Mahogany Obsidian Cabochon 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. Approximately Size: 10-30mm / 7/16-1 3/16 Inches; Approximately Weight: 15-40gr / 0.5-1.4oz. Rhodonite is a pink manganese silicate of variable composition that often contains significant amounts of iron, magnesium, and calcium.Rhodonite is often associated with black manganese oxides which may occur as dendrites, fracture-fillings, or matrix within the specimen. Other names for rhodonite include: manganese spar, manganolite, and rhodarsenide. Chemical Composition: MnSiO3; Hardness: 5.5 - 6; Composition: Manganese silicate, sometimes with some calcium, iron, and magnesium; Color Red, pink, orange-red, and brownish-red. Massive specimens often have black veins running through them. Rhodonite is an attractive mineral that is often carved and used in jewelry. It is named after the Greek word for rose, rhodon. Its rose-pink color is distinctive and can only be confused with rhodochrosite and the rare mineral, pyroxmangite. Rhodochrosite however is streaked with white minerals such as calcite and is reactive to acids. While rhodonite does not react to acids and is usually associated with black manganese minerals and pyrite. (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.)