These crystals are literally iridescent; changing many different colors when seen from different angles. If you like pastels, you will want to add these 20mm to your collection. They measure 2 1/4" and weigh 4 grams each. These crystals are approximately the size of a nickel (see photo 3). The earrings are offered in sterling, silver filled, gold filled and Argentium. Matching pendant available. Please see our "About Us" page for information pertaining to Argentium and quality of our chainmaille.