A new tool for screening gemstones
GemPenĀ® is a powerful portable tool for today's jewellers & gemmologists to screen diamonds, rubies & sapphires for synthetics & treatments.

Xenon UV screening tool with Ultra Spectrum Optical Filtering Technology

Distinctive indications

Separate natural untreated from synthetic and treated gems

Throughout the value chain

Works for rough, polished and mounted gems


A portable viewing environment for GemPen

GemPen Academy / Gemstone map

Knowledge resource hub for interpreting results

GemPenĀ® Premium & Darkroom - Screening Synthetic Ruby


GemPenĀ® Premium & Darkroom – Screening Synthetic Ruby

GemPenĀ® Diamond Screener & Darkroom Tutorial - Natural or Lab Created?


Watch GemPen screen diamonds for synthetics

Tailored Accessories

Three additional interchangeable Filters

Tailored Accessories

Travel Case with perfect fit and feel

Awarded design

Awarded with a Red Dot for user-centered design excellence

Third party validation

GemPen is included in the Assure Program for verification instruments


Bring it anywhere. Battery powered and USB rechargeable

Time saving

Screen hundreds of gems in a matter of minutes

Size independent

Screen gems regardless of size


Dust, moist and shock resistant