AuRACLE 18k Yellow Plumb Calibration Round

The AuRACLE 18K Yellow Plumb Gold Calibration Round is a precision calibration disc designed specifically for use with the AuRACLE gold tester. Proper calibration is essential for accurate karat readings, and GemOro recommends using an 18K yellow plumb gold sample as the calibration standard. This disc meets that specification exactly, ensuring your AuRACLE tester performs to its full accuracy potential.

Plumb gold refers to gold that is guaranteed to be no less than its marked karat value — in this case, no less than .750 fine gold (18K). This standard has been the benchmark for 18K gold in the United States for nearly 40 years. Prior to the introduction of plumb gold standards, jewelry marked 18K in the United States could legally contain as little as 17.5K gold. Using a verified plumb gold sample eliminates that ambiguity and ensures your calibration baseline is accurate.

Features

• Purpose-made calibration disc for the AuRACLE gold tester
• 18K yellow plumb gold — guaranteed no less than .750 fine gold
• Meets GemOro's recommended calibration standard for the AuRACLE system
• Ensures accurate karat testing results when used for regular calibration
• Conforms to the U.S. plumb gold standard established for 18K jewelry

Specifications

Notes

GemOro recommends calibrating your AuRACLE tester with an 18K yellow plumb gold sample for best accuracy. Any piece of 18K yellow gold you are certain is .750 fine will function as a calibration reference; this disc provides a dedicated, reliable standard for that purpose.

California Prop 65 Warning:
Cancer and Reproductive Harm. www.P65warnings.ca.gov.