GIA Utility Lamp – Precision Lighting for the Duplex Gem Refractometer

The GIA Utility Lamp, engineered specifically to complement the GIA Duplex I Gem Refractometer in approximate 1967 (Journal of Gemmology, 1967, Vol 10, No. 6). This purpose-built illumination tool delivers the optimal wavelength, brightness, and beam consistency required for clear, reliable reading of refractive indices.

Designed to eliminate glare and minimize light scatter, the GIA Utility Lamp provides stable, focused illumination that allows gemologists to see shadow edges and RI values with exceptional clarity. Its compact, angled housing positions light precisely where the refractometer needs it—ensuring consistent results whether you're working in a lab, classroom, or field environment.

The top of the device features an additional window specifically designed to provide illumination for use with a spectroscope and dichroscope.

Built with durability in mind, this lamp offers dependable performance, easy operation, and a clean, professional profile that pairs seamlessly with GIA instruments.  Achieve the precision your gemological work demands. The GIA Utility Lamp is the trusted lighting solution for accurate, dependable refractive index measurement.

Both versions of GIA Utility Lamps are no longer in production.