Labradorite - Ruby Bracelet I (3-5.5mm)The Inuit called labradorite a fire stone. The Sanskrit word for ruby is ratnaraj, king of precious stones. This bracelet carries both. Product Highlights: The Stone: Two stones, one bracelet. Labradorite looks grey until it moves. Then it fires. Blues, greens, golds, and sometimes violet appear and vanish depending on the angle. This effect is called labradorescence. It is caused by light bouncing off microscopic internal layers inside the crystal.