Jade is certainly very precious in Chinese culture. Jade is a beautiful stone, of gorgeous colour.
Please don't worry about the old negative meanings - most of those are virtually obsolete anyway.
I don't think I'd ever use the name myself (with the exception of Amber and Saffron I'm not too keen on non-traditional names) but Jade Michele is a pleasing combo (I've always preferred Michele to Michelle). Romaine is cute too!
Try to bear in mind that most names have their detractors!