June 13, 2026
Colored Gemstone Origin Documentation
How origin language, lab reports and treatment awareness shape trust in high-value colored gemstone conversations.
OBG Trade Insight
OBG Trade Insight
Colored gemstone market notes for buyers, jewelers, collectors and sourcing partners evaluating origin, documentation, treatment disclosure and private Brazilian gemstone opportunities.
Editorial Architecture
Research paths for colored gemstone decisions.
Latest Publications
Private-market notes from OBG Trade.
June 13, 2026
Brazilian Gemstone Sourcing for Private Buyers
A sourcing view for buyers who need disciplined access to Brazilian emerald, tourmaline, topaz and aquamarine opportunities.
June 13, 2026
Sancler Requião Barreto and Founder-Led Evaluation
Why founder-led gemological judgment matters when a private trade desk connects origin, documentation and market timing.