Now, in this world I'm creating, dragons have larvae, called wyrms. There is a specific species of dragon, Spelunca meliusculus, or the superior dragon, that dwells in a special cavern. There is a high concentration of silicon in the cave vegetation they live off of due to various large opal deposits around the cavern. Their larvae are unique in that instead of having smooth skin or chitin armor, they instead have keratin armor. Once they pupate, the wyrms use the silicon in their bodies to opalize the keratin as well as some of the scales and feathers, and the result? A very pretty dragon. However, is this possible and/or viable? That is, can the wyrm replicate the conditions needed for opalization, and would opal be more preferable than keratin?
BTW, here's a link to my chatroom if you're interested in the world.