15038 D23-1 Hokkaidoite, Opal, Shikaribetsu Lake, Shikaoi (Shikaoi-Chō), Kato District, Tokachi Subprefecture, Hokkaidō Prefecture, Japan
Highly fluoresent yellow inclusions of hokkaidoite in opal that fluoresces pink and and purplish blue. Ex Hiromi Yamasaki Collection. Type Locality. Specimen measures 17mm. Photo under longwave UV.