This piece has been purchased and remains in this collection for the purpose of art. approx 2 inches, wrapped in silver plated wire and includes 20" silver chain.  To request an 18" or 24" chain, simply leave a note to seller at checkout.  Blue opal is a mineral with a composition similar to that of quartz, but with water molecules inside. Owyhee Blue opal is a delicate gem of great beauty and ornamental value. Its mystical brightness gives it an air of elegance that is hypnotizing for those who admire this stone. Owyhee Blue Opal is a high vibration crystal that has a beautiful calming energy.