Independent centre of excellence

Presidium Gauge

The Presidium measures gemstone dimensions with precision and accuracy.  Loose diamonds are weighed to three decimal places, and mounted diamonds are measured precisely using either a Presidium gauge, Schindler or C-Master gauge. An accepted formula will then be applied to estimate their weight to within a tolerance of five per cent of the true weight. For very small stones a Meleemeter gauge may be used.

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