Skip to content
Contact Us Jewelry School Partners Frequently Asked Questions Submit Tax Exemption
Presidium PGI Gem Indicator - Otto Frei
Presidium PGI Gem Indicator - Otto Frei
Presidium PGI Gem Indicator - Otto Frei
Presidium PGI Gem Indicator - Otto Frei
Presidium

Presidium PGI Gem Indicator

Part # 156.750PGI 5 In Stock Weight -- lb / -- g
$368.00

The Presidium Gem Indicator (PGI) is the only handheld tester specifically designed for colored gemstones. Using advanced thermal conductivity technology, it can identify up to 31 different gem types and includes a color input function with 12 common gemstone colors for even greater accuracy. A clear digital LED screen ensures easy-to-read results, while the patented changeable probe tip delivers reliable, long-term performance.

The PGI is a convenient, handheld upgrade from the popular Presidium PGT/CSE Gem Tester (SKU: 156.750), combining proven accuracy with enhanced portability.

Features

  • Differentiates diamonds from other colored gemstones
  • Identifies up to 31 gemstone types
  • Color input function with 12 color choices for improved precision
  • Thinner 0.45mm retractable probe tests stones as small as 0.2 ct
  • Changeable probe tip for extended service life
  • Built-in metal alert buzzer
  • Low battery indicator
  • Internal gemstone database with color references
  • USB connection for firmware and software updates

Specifications

Testing Range Up to 31 colored gemstones
Probe 0.45mm retractable thermoelectric probe, changeable tip
Minimum Stone Size 0.2 ct and above
Display Digital LED
Power 3 x AAA batteries (not included)
Connectivity USB connection for software updates
Recommended Ambient Temp 73–80°F (23–27°C)
California Prop 65 Warning California Prop 65 Warning:
Cancer and Reproductive Harm. www.P65warnings.ca.gov.
Brand
Presidium
Part #
156.750PGI
Type
Scales & Testing
Dimensions
8 in x 3.5 in x 2.5 in
Testing Range
Up to 31 colored gemstones
Probe
0.45mm retractable thermoelectric probe, changeable tip
Minimum Stone Size
0.2 ct and above
Display
Digital LED
Power
3 x AAA batteries (not included)
Connectivity
USB connection for software updates
Recommended Ambient Temp
73–80°F (23–27°C)