Pink Mangano Calcite Cube Uniqueness Guaranteed: Every item is one-of-a-kind, making them ideal for all projects or designs. Avg Size Range: (1.25 to 1.5 Inches Long) Dimensions Vary Slightly Calcite is a mineral that forms mostly in limestone deposits and caves, and can exhibit a wide range of colors depending on the impurities and trace elements it absorbs from the surrounding area. Mangano calcite, formally known as manganoan calcite, contains high amounts of manganese and glows under ultraviolet light. Handmade items vary in size, shape, and color when selected randomly (the highest quality items are chosen first). They'll be as beautiful as those in the photos.