Digiweigh-DIGITAL Jewelry SCALE-Diamond/Gemstone Pocket Jeweler Gem Tool Catat/Ct With this scale you can CHOOSE FROM FOUR (4) WEIGHING MODES: Carat (ct), Gram (g), Ounce (oz), Grain (gn) Capacity & Accurcary: 100 x 0.1 g, 3.527 x 0.0005 oz, 500 x 0.05-ct, 1542.8 x 0.2gn CLEAR PLASTIC COVER doubles as an expansion tray! STAINLESS STEEL COVER is durable & easy to clean!