18K Plumb Gold Calibration Disc for Gold Testers

18K Yellow Gold Square Calibration Disc for GemOro Gold Testers

This 18K yellow gold square calibration disc that is manufactured in the US by Pepetools, is a compact reference sample for calibrating compatible GemOro electronic gold testers. Made from true 18K yellow gold, it provides a dedicated known-metal contact surface for routine calibration, helping support consistent testing procedures in jewelry shops, gold buying counters, repair departments, and professional testing workstations.

The square calibration piece measures approximately 6.35 mm x 6.35 mm and is only 0.25 mm thick, making it easy to store with your testing supplies while still offering a flat surface for contact with the tester probe and plate. Its small, low-profile format is ideal for users who want a dedicated 18K reference piece rather than relying on finished jewelry, which may vary in actual alloy content even when marked with a karat stamp.

Designed for Calibration Support

Use this 18K yellow gold square disc when your tester requires an 18K yellow gold reference sample for calibration. For best results, keep the contact surface clean and follow the operating instructions for your specific tester model.

Looking for a compatible tester? View the GemOro 2012 AuRACLE Pro Digital Gold & Platinum Testing Machine.

Product Highlights

• True 18K yellow gold reference sample for calibration use.
• Square 6.35 mm x 6.35 mm format with an ultra-thin 0.25 mm profile.
• Dedicated calibration piece helps reduce reliance on variable stamped jewelry.
• Compact size stores easily with gold testing supplies and bench equipment.
• Suitable for jewelers, refiners, pawnbrokers, gold buyers, and repair shops.
• Contains 0.15g of 18k plumb yellow gold

Note: Always follow the calibration and operating instructions supplied with your specific GemOro tester. Compatibility and readings may vary by model, surface condition, and testing procedure.