Thortveitite is a rare mineral consisting of scandium yttrium silicate (Sc,Y)2Si2O7.

It was named after Olaus Thortveit, a Norwegian engineer.

It is grayish-green, black or gray in color.

[3][4][5][6] A transparent gem quality example was found in 2004, and reported in The Journal of Gemmology.

This article about a specific silicate mineral is a stub.