Sep 8, 2026
Sotheby's Hong Kong, September 17 — the autumn curtain-raiser
Sep 1, 2026
The 5-minute weekly intelligence on the colored stone market. · September 1, 2026
Aug 25, 2026
The 5-minute weekly intelligence on the colored stone market. · August 25, 2026
Aug 20, 2026
The color-change gem that defies category.
Colors, origins, and what makes it unique.
Colors, origins, and why collectors are paying attention.
Color, origins, and what the market hides.
How to tell them apart, and why price differs by 10x.
Colors, origins, and what the market won't tell you.
Aug 18, 2026
The 5-minute weekly intelligence on the colored stone market. · August 18, 2026