Knowledge Hub
Market commentary, stone reference, and pricing fundamentals for diamond professionals.
Blog
Market reports and commentary.
Encyclopedia
A reference for cuts, characteristics, and terminology.
Learn
Step-by-step guides on diamond pricing.
Latest from the blog
Diamond price by shape: the 2026 elongated premium
Marquise, pear and oval now ask above round per carat in the bridal band, while cushion and asscher sit 30% below. The fancy category has split in two.
Rapaport price list alternatives: what desks price against in 2026
A price list anchors asking prices, not trades. Here is what the Rap grid cannot cover in 2026 and the four references desks quote against instead.
Discount to Rap: how to price a diamond against Rapaport in 2026
What discount to Rap means, how to calculate it, and why one flat back misprices GIA, IGI, carat, and lab-grown stones on the same book.