... price: Units: g, oz, dwt, ozt, ct, gn. Jewelry scale, pocket scale, digital jewelry tool from factory with good quality and low ... price: The Model NJA Jewelry Scale is a very accurate gem scale, complete with two calibration weights and tweezers ... box with two calibration weights and steel tweezers included. Scale size: 115 x 66 x 35mm. Net weight: 90g. scale,electronic scale, high precision ...