Presidium PGI Gem Indicator

Put a name to a colored stone at the bench instead of sending it out. 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, 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

Notes

Batteries are not included. Work in a stable ambient temperature of 73–80°F (23–27°C) for the most consistent readings.