Sorry I don't know about the bangle or the necklace but I tried on the ring in rose gold w/o diamonds at the Topanga Mall Cartier. I think it was $1900. It's cute!
If you go on the Cartier website, and go to the item you want, and click on "more information" and fill it out and stuff, and check the box that says "price" they'll email you the current price of the items.