Type... Domestic Mineral Apatite... The 〇 is U. Size is 8cm x 5cm x 2.5cm, weight is about 200g. It was a gift received quite some time ago. Please understand that the origin is unknown. Under shortwave UV light irradiation, it appears a deep yellow-green to the naked eye, but a deep blue in the photograph. It appears to contain a small amount of uranium, which is considered harmful to humans, so please check the precautions published online regarding handling and storage after purchase. We ask for your consideration if you can understand the above.