5 x 3mm. 2A Grade Labradorite highly polished gem stone rondell beads!!!! The gem stone Labradorite is mined in India, Madagascar, Newfoundland, and Russia. Labradorite is a beautiful stone that displays rainbow-like colors, called iridescence, when it is viewed from different angles. Labradorite is sometimes referred to as Spectrolite. Labradorite beads metaphysical properties include the ability to reduce anxiety and stress.