What is the finest trade grade of lapis lazuli?

The finest trade grade of lapis lazuli is recognized as Persian lapis lazuli, which originates from the Badakhshan region in Afghanistan. This type of lapis lazuli is highly sought after for its intense, rich blue color, which is often flecked with golden pyrite and white calcite. The quality and shade of the blue, along with its historical significance and rarity, contribute to its prestigious status in the gemstone market. Persian lapis has been valued for thousands of years, from ancient civilizations to modern gem enthusiasts, making it synonymous with the highest quality of this stone.

Other trade grades like Chilean, French, and Indian lapis lazuli are available and may possess good qualities, but they typically do not match the rich historical significance, depth of color, and overall aesthetic appeal of Persian lapis lazuli. Thus, Persian lapis is considered the premium grade among these.