When celebrities get engaged, the paparazzi usually can't wait to get a shot of the ring.
Instead of showing off a huge rock that makes every girl drool, the actress has been rocking a emerald ring with a gold setting.
This is definitely not the typical princess or cushion cut million dollar rock we're used to seeing.
We wonder what made the couple go against the grain with their engagement bling?
Check out Halle's green rock in the gallery above.