Spectrolite is a type of feldspar mineral that is known for its iridescent appearance, which exhibits a variety of colors when viewed from different angles. Some common synonyms for spectrolite include labradorite, moonstone, and rainbow moonstone, all of which feature a similar play of colors. Other synonyms for spectrolite include feldspar, which is the mineral group to which it belongs, as well as adularescence, which refers to the milky, bluish-white glow that is often seen in these stones. Spectrolite is a popular gemstone for jewelry, and its unique beauty has earned it a special place in the hearts of many collectors and enthusiasts.