Citrine Sterling Silver EarringsRound citrine drops in silverthe classic birthstone form at its most wearable. Citrine is iron bearing quartz whose amber color develops through ferric iron (Fe) in the crystal structure, formed through natural geological heat or through warming of amethyst to 400500C. These round cut stones are set in solid . 925 sterling silver drops; the round brilliant cut distributes light evenly across the surface, giving the stone a steady, warm glow rather