RIch Natural Blue Aquamarine Gemstone Necklace.. Over 50 gemstones. The gems are 4.5 to 5mm in size. Semi translucent stones in varying shades of light blue throughout. These are more of a rough cut aquamarine. The necklace length is 18-19". The chain is 14k gold plate and the clasp is 14k gold filled. Shipping is Free!