is calcite pseudomorph after ikaite, named from Glendon NSW ,Australia ,where is was originally reported. This piece comes from Olenitsa River,White Sea Coast,Kola Peninsula,Murmanskaja Oblast’,Northern Region,Russia. I found more info in the website www.glendonite.com. Opaque. Size:10x10x6.5 mm. Weigth:3.25 ct. CODE#3135