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AuRACLE 14k Yellow Plumb Calibration Round - Otto Frei

AuRACLE 18k Yellow Plumb Calibration Round

Part # 156.799CAL

Single unit weight: -- lbs / -- kg

$55.21 - $55.21
$55.21
$55.21 - $55.21
$55.21
Availability:
Only 3 left!
by GemOro

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Product Details

This is a 18K yellow plumb gold disc used for calibrating the AuRACLE gold tester.  Calibration is very important when using the AuRACLE, and GemOro now recommends that you should use a 18k yellow plumb gold sample for calibrating. Any piece of 18k yellow gold you have that you are certain is .750 (18K) will work for calibration gold.  "Plumb" gold refers to the fact that this gold is no less than .750 (18K) percent gold, the standard for 18k gold in the United States for close to 40 years.  Prior to the introduction of plumb gold standards, jewelry marked 18k in the United States could be as low as 17.5k.

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