Talk:Opal Dragon/@comment-98.202.239.80-20121002012242/@comment-5104863-20121002013323

A simple way to look at Opal is that it is silicon dioxide and water. Melting silica (like sand) gives you the first part, and then water is chemically in Opal. So... Lava heats the mud, which is earth and water. Best I can come up for this without getting overly technical :)