A Gorgeous Vintage Australian Opal and Tourmaline Pendant for Necklace in Sterling Silver, with Pink and Green (Watermelon) Tourmaline. This stunning estate piece holds natural Australian opals with a beautiful array of colors in the light. The largest of the opals measures about 8 x 12mm. There are two pink tourmalines and the one at bottom shows a bit of green as well as pink, referred to as watermelon tourmaline. The setting is composed of sterling silver. Overall the pendant measures about 1 7/8 inches long by about 1 1/16 inches wide. This piece was acquired through an estate collection and is in lovely vintage condition.