Neon blue apatite from Norcross-Madagascar Apatite Mine, Isoanala, Betroka, Anosy, Madagascar. Comes with certificate of authenticity. Average weight (Carats): 0.47 ct. Dimensions (mm): 6 x 3 x 2 mm. Ref. : SKU048850. Phosphate mineral, often used as a source of phosphorus for fertilizers. Used in jewelry for its varied colors.