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 are always real gemstone and the 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 Gold version has an 18" gold filled chain and the gemstone is wrapped with 26ga. 14k gold filled wire. You wont have to worry about it turning or tarnishing. Please let us know in the Order Notes when placing your order if you have any special requests or want different chain length.