Very nice design with a small faceted square. Can be done in other stones also as, tourmaline, Red garnet etc. Stones can be used Amethyst, Garnet, citrine, sky blue topaz, Peridot, rainbow moonstone labadrorite, black spinel, milky aquamarine, carnelian, white quartz etc. We have other stones also, all jewelry rhodium plated, nickle free. 925 stamped
