

💎 Spot the real sparkle before anyone else does!
The GAIN EXPRESS Jeweler Diamond Tester is a professional-grade, portable tool designed for retail jewelers and pawn brokers. It uses advanced technology including ultraviolet light and multi-level calibration to accurately identify authentic diamonds as small as 2 points, distinguishing them from simulants and metals. Featuring audible and visual alerts, a compact design, and flexible power options, it delivers reliable, fast results to ensure confidence in every gem verification.






| ASIN | B00MNEB0U0 |
| ASIN | B00MNEB0U0 |
| Batteries Included? | No |
| Batteries Required? | No |
| Customer Reviews | 3.8 3.8 out of 5 stars (144) |
| Customer reviews | 3.8 3.8 out of 5 stars (144) |
| Date First Available | 1 January 2024 |
| Date First Available | 1 January 2024 |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 150 g |
| Item model number | JEM-II |
| Item model number | JEM-II |
| Manufacturer | GAIN EXPRESS |
| Manufacturer | GAIN EXPRESS |
| Material | Metal |
| Part number | JEM-II |
| Power source type | Battery Powered |
| Product Dimensions | 17.78 x 7.62 x 5.08 cm; 149.69 g |
| Product Dimensions | 17.78 x 7.62 x 5.08 cm; 149.69 g |
| Style | Compact |
A**O
Can’t tell diamond from moissanite.
This tester can’t tell the difference between diamonds and moissanite.
W**M
Very easy to use. Good price.
G**R
Schnell seriös und zuverlässig
A**A
Hay que insistir. El aparato funciona porque lo hemos probado con joyas que sabíamos que eran buenas y otras que sabíamos que no. Pero y tengo que decir que hay veces que pita y otras que no en la misma piedra o sea que cuidado con dar por malo algo que puede ser un brillante, mejor repetir la operación unas cuantas veces porque le cuesta. Eso sí, si la piedra es mala no va a pitar lo pongas como lo pongas.
Y**E
Magnifique, svp très fort.
R**S
This tester is good and it works.
Trustpilot
1 month ago
1 month ago