Maybe try this site:

http://www.forgottenworlds.co.uk/free/props.html

There are rings and a jewellery box,  You may be able to resize the box and maybe with the help of a  textured 1/2 sphere that you can use as a cushion, or even a resized pillow, make something that resembles a ring box.

Here is a pretty solitaire ring.

http://market.renderosity.com/mod/bcs/index.php?ViewProduct=55109&AID=448

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi