We travel to gemstone shows in North Carolina and Tucson, AZ several times a year to handpick our gemstones for our Birthstone Necklaces. Our current stone selections for the following months are: January/Garnet, February/Amethyst, March/Aquamarine, April/Diamond(Clear)Quartz, May/Emerald, June/Moonstone, July/Ruby, August/Peridot, September/Blue Sapphire, October/Opal, November/Citrine, December/Turquoise (see pics). Our Oxidized version has an 18" black oxidized sterling silver chain and the gemstone is wrapped with 26ga. 14k gold filled wire. Please let us know in the Order Notes when placing your order if you have any special requests or want different chain length.