Pick the 🪨 material and 📐 size. Buy with confidence. Scroll down to view examples of Antique Cushion gems previously cut and sold.
It takes approximately 6 weeks to manufacture your gem. You will receive live updates when the rough is processed, cut, inspected, and shipped.
Returns accepted on size 11mm or greater.
Length and Width tolerance +/- .1mm.
.25 micron final polish.
There are no cancellations once gems enter the production process. You will get an email notification when your gem enters the production queue.
GAGG is commonly used in PET scanners, where afterglow—or glow-in-the-dark properties—is actually an undesirable trait. As a result, most GAGG crystals are engineered not to exhibit this effect. However, every so often, a rare defective crystal is produced that defies this standard.
We’ve been searching for years to find a specimen with this unique characteristic, and this particular crystal stands out—glowing as brightly as the top 1% of any GAGG material we’ve ever encountered. It features a remarkable afterglow that lasts 10–15 minutes and, astonishingly, it’s also magnetic.
Returns accepted on sizes 11mm x 11mm or greater within 3 days
Examples of more Cerium Doped GAGG "ULTRA GLOW" Gems
