GemCensus

[Cyprias]

GemCensus (GC) inspects people and records which gems people have socketed. Then shows you in a table which gems are the most popular along with their raw & cut price and profit to be made. GC can pull prices from Auction Lite, Auction Master, Auctionator and Auctioneer.

Project page: here

I haven't documented the project very well. There's options to filter gems based on rarity, level, known/unknown gems, profit, have mats, already have gem in inventory/auction.