Hi sweetie, that's awful, sorry that happened to you.
I agree with designer diva, that really sounds like a rip off and even if it was somehow legitmate, extremely unfair for your jewelery business as a big factor in consignment is not having all the overhead to have to worry about, you jus shouldnt have to dish out that much. You could either start your own site up or put all that money back into materials and such for your jewelry with $350. Also a friend/biz partner Leeah and I have an online collaborative consignment shop"Craft Addict" that's aim is to promote and expose independent designers (www.craftaddict.tk
It will be launching the 28th of this month. And instead of $350 (goodness that's so ridiculous) we only charge a $10 setup fee ( one time) to help with the initial over head, so we only have to charge each consignor 20% of their sales from then on. You can check out the site's Consign F.A.Q's guide for tons more info. And we're still looking for a few more consignors (specifically stationary and jewerly to round out the other designers different wares) so if you're interested let us know where we can view your designs.
Thanks so much and good luck to you, even if you dont work with us, there are tons of other online shops like in the link below you could consign with, good luck with your designs!