The Presidium Gem Computer Gauge estimates the weight and identifies gemstones with much greater precision and consistency.

This tool incorporates a precise digital calipers to measure the size of a gemstone, adds to that your input of the type of gemstone cut, and uses that data to estimate weight.

Or, if you provide the weight of a stone, this tool will also estimate specific gravity, and retrieve matching gemstones from its internal database, and thus aid in identifying unknown stones.

GEMSTONES & SHAPES
Covers 74 gemstones and 9 different shapes.

AUTO-MAGNETIC SHUT-OFF
Auto-magnetic shut-off to save power when placed in carrying case.
This power-saving feature is immediately activated when the gauge
is placed in its carrying case.

Exclusive features
- Direct carat conversion for round brilliant cut diamond.
- Harden platform.
- 0.01mm resolution.
- Weight computation through direct measurement or keypad entry.
- Universal serial bus interface with computer.
- CD-Rom with 133 gemstones.

S.G. Dictionary
Retrieve the specific gravity of specific gemstone directly from the
S.G dictionary by just entering the name of the stone.

Gemstone estimator
Identify an unknown gemstone material by entering the measurement and weight.  Once the SG is computed, the Gem Computer Gauge retrieves matching gemstones from its internal database!  Click on this Specific Gravity link for more detailed information on how to use the Presidium Gem Computer Gauge for specific gravity measurement and gemstone identification.

1 year factory warranty

Size : Length - 3.8" x Width - 2.4" x Thickness - .63"
Weight : 4 ounces or 120 grams without battery

This product typically ships within 1 business day.

Back to overview of Gem ID Tools