Stud Earrings We just love these Swarovski crystal studs in blue zircon (7/16" wide with a length of 9/16"). Such an amazing pop of color for everyday. Very, very chic. This Janis by Janis Savitt Collection is made of Swarovski crystals set in brass which has been silver plated. We are able to special order longer versions of any of the necklaces shown. Colors include: Crystal (clear), Fuchsia, Tanzanite, Peridot, Light Peach, Olivine, Aqua, Blue Zircon, Tanzanite, Peridot and Sapphire.