: Famous hubs include Bangkok , Thailand and Ratnapura , Sri Lanka . While deals exist, these markets require a trained eye to avoid inflated tourist prices and scams.

: The measurement of the gem's weight. Prices often jump significantly at whole-carat milestones (e.g., 1.0ct, 2.0ct). 2. Verify Authenticity & Treatments buy precious gems

: The precision with which a stone is shaped to reflect light. A high-quality cut maximizes the gem's "fire" and brilliance. : Famous hubs include Bangkok , Thailand and