Rinkite-Ferrokentbrooksite 1.38 ct.
Rinkite-Ferrokentbrooksite
The Rinkite is a brownish-yellow crystalline silicate of cerium.The formula is Na(Ca,Ce)2(Ti,Ce)(SiO4)2F and hardness 5.Here we have violet-brown crystals in Nepheline-Feldspar matrix associated with Ferrokentbrooksite. This mineral has a complex formula: Na15Ca6(Fe,Mn)3Zr3NbSi25O73(O,OH,H2O)3(Cl,F,OH)2 containing many rare earth elements. Radioactive.
From Skutesundskaier,Barkevik,Langesundsfjorden,Vestfold,Norway.
Rare stone for collectors.
Size: 8.1x8.1x3.9 mm.
Weight: 1.38 ct.
CODE#8630
- Origin
- Norvegia