Stunning black sparkle, created by timeless elegance and produced by the composition of black Czech Glass Crystal, Hallmarked 925 silver and Ferido™ Formula x1 a moldable two-part epoxy adhesive that creates the spherical core of these sparkling Sterling Silver Czech Glass Stud earrings. Glittering 10mm spheres add sophistication to the looks, catching and reflecting the light on the facet cut crystals generates a wonderful sparkling jewelry.