The Michelson Gemstone Index and Palmieri's Market Monitor are comprehensive gemstone pricing index guides. Other guides, such as The Diamond Registry Guide and the Rapaport Diamond Report, focus exclusively on diamond prices.
The Michelson Gemstone Index is a quarterly guide that contains pricing information for diamonds and colored gemstones. The publisher offers paperback and online editions.
Palmieri's Market Monitor is a monthly guide that lists prices for natural diamonds, irradiated diamonds and colored gemstones. Unlike The Michelson Gemstone Index, Palmieri's Market Monitor contains auction price data from Christie's and Sotheby's. This publication also contains information on old, uncommon diamond cuts.