Taloras said:
... cleric of Olidammara, god of wine, women, and song.
Okay, now where's the cantrip to create women?
Err, just meant if you're creating wine, might as well also try and create the women.... (creating song is easy to do so no spell needed for that
(umm.. bad joke, sorry

)
Anyway, back to topic. I think it seems reasonable.
Either of the options seem viable: the Material component (the gem or gold) or making it an XP compoent of 5xp or so. Both seem to handle the task.
Perhaps adding DF as another component? (then again, I am prejudice and think a DF should be needed for most if not all divine spells)...
Or if you want to go for a dramatic effect, add an additional M , a grape (or handful of) that get crushed in hand during the casting. Of course, that does make the spell a little more difficult to cast if they have to find/carry grapes everytime.
But, bottom line, I think what you have going so far should be fine over all.. all these other changes that are being sugested by me, above, are minor quips that really don't make a heck of a lot of difference.