Lab Created Ruby Gemstone Ear Posts, 2.5 mm Our Birthstone Stud earrings are simple expressions that may be worn for any occasion or simply for everyday wear. Subtle by design, these faceted gemstones are set into either sterling silver or 14K gold prong settings with post backs. Wear solo or incorporated into a stacked earscape look with multiple piercings. These look equally nice worn by men or women. Note: Due to the one-of-a-kind nature of gemstones, exact colors and patterns may vary from what is shown in the image. Lab-created White Sapphire gemstones are also available in 7mm round faceted gemstones. Available in twelve Avery birthstones Garnet, Amethyst, lab-created Aqua Spinel, lab-created White Sapphire, lab-created Emerald, lab-created Alexandrite, lab-created Ruby, Peridot, lab-created Blue Sapphire, lab-created Pink Sapphire, Citrine Blue Zircon or Blue Topaz. Our Amethyst, Citrine and Blue Topaz Stones Have Been Heated or Irradiated to Enhance the Color. Avoid Direct Sunlight or Extreme or Prolonged Heat.  From James Avery, these earrings feature: 14k gold Post closure Approx. 2.5mm diameter Crafted in America using the world's finest materials.