5mm triangle 4pcs ruby natural ( fisherfill treated in thailand) 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.
here amethyst image also shown, that cost is less than ruby ring.