RERUN! I still haven't seen it though.
There is an ad for "Kay Jewlers" running (Locally?) . The guy and girl are in a horse-drawn carrage. Guy hands girl a velvety box and while she's opening it holds one hand kind of up at ear level, then...just when she opens the box
bam flashlight right at the diamonds. Looks like a nice light, but incredibly tight beam--after he shines the light on the jewlry it cuts to a closeup of the necklace in the box and the beam (With the flashlight possible 2' away) is only covering the velvet box, nothing else
looks like post-production to me...