Phenomenal 1.62ct rainbow spark Sphene

This is such a great gemstone. It has a color shifting hue that moves between yellow and green with vivid saturation. It exhibits glittering flashing that reflects its color palette, and flashes of red and green rainbow spark that makes this gem type so desirable. It measures 9.2mm x 4.7mm x 3.6mm, and is covered with a diamond grade superior luster. Unheated. Sourced from Russia.