Dig the metallic feathers; would recommend a different texture for the crystal, though. It looks a bit too photo-realistic. Maybe simply tinting it green through geoset animations will be enough; or you could duplicate the geoset, enlarge it and make it additive for a shiny crystal-like effect.
However, I would simply recommend going for the Ancient Ziggurat / Nerubian Ziggurat texture (doodad in TFT). It has a pretty nice, green gem, perfect for blood elves, and I think there might be a TC variant somewhere too, teamcoloured gems are always neat.
All that aside, really happy to see you doing stuff! I recently picked up the ol' toolkit myself, who knows, might even release something eventually.