I'm a huge fan of this size range and have bought quite a few of them. I've had a lot of luck with Dutton's Diamonds (got a 3mm demantoid and have a 4mm benitoite on hold) and D&J Rare Gems (got a 4x5 Mali garnet). Lisa Elser is another great cutter who sold me a ~3x5mm oval tsavorite, though I can't recall if she has anything else that small in stock. I also have some that I bought second-hand from Freke, cut by Barry Bridgestock and Dan Stair, though I haven't seen too many on their website in that size range lately.
Have you tried gemselect.com? I know some folks have had mixed experiences with them, but I''ve gotten a few goodies there that I''ve been very pleased with. I''ve seen matched suites on there of various gem types in the past.
Date: 12/26/2009 5:05:36 PM Author: Kashmira
Thanks for your suggestions. What I do hope to find is a small Paraibla tourmaline and a small padparadscha sapphire.