One way to get even lighting when taking macro photos is to use a ring flash. Unfortunately, these can be expensive. DIYPhotography.net has instructions for making your own ring flash using tiny LED lights. Read it here: http://www.diyphotography.net.
MSchindel and others on Metal Clay Gallery strongly recommend Knead-a-Mold as their favorite RTV two part silicone mold making material. (RTV = room temperature vulcanizing).
You can find it here: http://www.townsendatelier.com
And Cyndi Lavin has a great round up post on where to sell online, here: http://www.blisstree.com/jewelryandbeading. I especially like the link to the article on how to get the attention of the etsy admins — I’m sure some of you having been looking for just that information.