polished labradorite natural mineral stone surface with an optical effect known as labradorescence

mineral stone labradorite labradorescence optical effect iridescent opalescence abstract adularescence anorthite aventurescence background cabochon calcium canadian cracked crystal feldspar fibrous gemology gemstone glowing holographic ilmenite inclusion infix internal cracks labradorization light diffraction lustre madagascar massive metallic mineralogy mineraloid natural opalescent pattern psychedelic rainbow rock slab rutile schiller sky blue spectrolite structure surface texture translucent triclinic