The ultimate Jadeite Ring.
Is for sure a white gold imperial jade ring paired with diamonds.
That is a engagement surprise of top level. The women like them, they are attractive and have a substantial promising level nobody will get this "every day" it must be someone special.
In the past this were mainly nephrite rings.They are also called "Chinese Jade" but since a few year the better quality jadeite from Myanmar (Burma) is moving in and there really is something better to see. A great surface, wonderful texture, fabulous colors and excellent artwork of mostly Chinese craftsmen (also in Myanmar).
This rings are mostly purchased by "Chinese Ladies", there is a reason why they call the green stone "Diamond of the East".
Engagement rings are available in a variety of metal setting including silver gold or platinum often paired with a diamond. Were the cool color of platinum and white gold plus silver makes it a visually interesting match.
Another idea could be a jade designer engagement ring which needs some communication with an creative jeweler and might be a bit more pricey but on the other hand a real unique piece of work.