Genuine Aragonite Stalactite Slice from Mexico (259.3 grams)AAA quality, rare find translucent perfect bullseye yellow Aragonite stalactite slice. Polished on front and rear sides. Aragonite is a naturally occurring polymorph of calcium carbonate which differs from calcite in its crystal lattice structure. A delicate coral like form of Aragonite is known as Flos Ferri, and the more common twinned hexagonal prismatic forms are known as Aragonite Sputnik. Weight: 259. 3 grams, Dimensions: 5 x . 5 x 4. 5 inches