I have two pairs of 5mm round Tanzanites, but they are loose, not set... I know you are looking for Tanz studs but if nothing pops up that meets your needs and you become interested in a loose pair, please let me know and I'll be happy to take some pics and put up a listing on DiamondBistro.
Sure Yenny I'll take some photos and put up a listing... hopefully later today but more likely tomorrow - and I'll put a link here so you know it's up and available.
Yenny, sorry it took me longer to get up a listing - and it turns out I have one 5mm pair and the other pair is 4.5mm - both I would describe as medium violetish-Blue - on my camera the stones were looking a bit more blue than IRL but now that I've posted the pics on DB they seem to show more violet than I see IRL - I don't know, I've got a new laptop and am noticing colors look different! I do think the 4.5mm pair are a bit more blue than the 5mm...