Yes, I kid you not; this is what she states on her website:
The strictly guarded secret of Chinese royalty in antiquity—queens and concubines used them to stay in shape for emperors—jade eggs harness the power of energy work, crystal healing, and a Kegel-like physical practice. Fans say regular use increases chi, orgasms, vaginal muscle tone, hormonal balance, and feminine energy in general. Shiva Rose has been practicing with them for about seven years, and raves about the results; we tried them, too, and were so convinced we put them into the goop shop. Jade eggs’ power to cleanse and clear make them ideal for detox…Steel yourself and read on: What is it with Gwyneth Paltrow and the vagina?
