White Pyrite Heart Briolettes measure approximately 8.5x8.5mm to 11.5x11.5mm in size. These Pyrite gemstones have a metallic luster showing great faceting and good polish with external pitting. The White Pyrite gems are a symmetrical shape with a generous depth on the opaque beads. White Pyrite is a very beautiful dark sterling silver-like hue with plenty of metallic brilliance in a hefty weight.