Have you contacted Doug? I would recommend sending him a PM. He may have something that you are interested in besides just those two pearls. On another note, if you want a pearl that has more of a vibrant and lively color versus black for a wedding, have you seen the abalone pearl. Here is a link to get information on them:
http://www.bluepearls.com/ They are currently being cultured but there are people here on this guide that own natural versions. The only problem with these pearls is that they are not round. They remind me of opals. They are just gorgeous!
Also, you may want to have her finger sized if you haven't already. If she wears rings and you don't want to ruin the surprise, take one of her rings that she wears and a jeweler can give you the size based on that ring, even if it's a ring that she wears on another finger like the middle finger.