Actress Geneveve Nnaji Poses With Engagement Ring.

This seems to be an engagement ring on the highly secretive Nollywood's screen goddess, Genevieve Nnaji's middle finger. The 34 year old movie star and mother of one posted this picture earlier today on her instagram page with 'genevievennaji'.
Is this an engagement ring or its just a mere fancy ring?

Source http://www.toniaodili.com/2013/04/is-genevieve-nnaji-engaged.html?=0