

Before every use the Gemoro Auracle Analyzer Gold Tester requires a piece of Pure 18k Yellow Gold Plum for calibration. You may use your own 18k piece of gold plum as long as it is exactly 18k yellow gold, if it is not your unit will not be primed/calibrated correctly. Many rings and pieces of jewelry even when stamped 18k can vary by up to 30%. That is why we are offering one bead of 18k Yellow casting grain weighing approximately .2-.25 grams and measuring 6mm in diameter specifically for Priming the Auracle Analyzer. You should lightly file the top and bottom of any calibration or test piece to get a good, clean surface for the test pen and test plate.