OUR promise
Handpicked for Quality
Every parcel we offer begins at the source. We work directly with trusted miners and lapidaries across Afghanistan, Myanmar, and beyond inspecting each lot of rough by hand under both daylight and UV to confirm color, clarity, and authentic character before it ever reaches your bench.
No treatments, no shortcuts, no filler. What you see in our listings is exactly what arrives at your door genuine natural material selected for its response, transparency, and cutting potential, packed and weighed with the same care a maker would expect.
It's a standard built for independent creators and collectors who value provenance as much as beauty the foundation of everything we sell.
Customer Reviews
Loved by Makers & Collectors
The rough I received was exactly as described — clean, reactive, and beautifully packed. It's rare to find a supplier this consistent with quality.
Sarah M. — Jewelry Designer
Every parcel feels handpicked. The color response under UV was stunning, and knowing the material is genuinely untreated makes all the difference to my work.
David R. — Lapidary Artist
As a collector, provenance matters to me most. CGB's honesty and consistent grading have made them my go-to for rare, authentic gemstone rough.
Elena K. — Gem Collector