3mm rounds 16 pieces and 1mm round 4 pieces. Choose your preferred stone combination and ring size; Stones that can be used are (but not limited to): amethyst, garnet, citrine, sky blue topaz, peridot, rainbow moonstone, labradorite, black spinel, milky aquamarine, carnelian, white quartz, etc,. All jewelry is rhodium plated, nickel free, and 925 stamped.