labradorite, a mineral that is valued as a gemstone and as ornamental material for its iridescence

labradorite smooth stone mineral valued gemstone ornamental material iridescence beautiful nature piece slice natural organic layered structure valuable attractive semiprecious precious closeup color surface colorful polished pattern luxury geology shiny black plagioclase iridescent convex gemology decorative geological elegance esoteric glossy veins mineralogy hardstone lithotherapy energy shape symbol texture abstract textured selective focus