Red coral ! fairly cheap, easy to use. It stays bright red! #It would appear very bright red from all light sources. Let me know and I will email a pic of some. I will try to take a pic and show some here in the AM. I have some in slab form and small branches. It cuts easily with a jewelers saw, you might want small branches for eyes, but even coral crushed into dust added to epoxy will look great.
Rubies was my first thought too, but to get any color out of them you need a reflective back to them. Same with most clear stones and jewels, they need light to shine. Sure would be pretty under a spotlight. But under most light and casual glance they would appear like a small shiny spot without color.
For the wings I would use the real dark green abalone. If you prefer, turquoise comes in all colors and works well also. Oh, just read the post again. The veins could be in a dark red that would be subtle, great contrast to the ebony. Is it really veins and not a skeletal shape in the wings? I would probably tend to the shell and coral over stone. The coral and shell will reflect well under a spot light.
Sounds fun, let us see some pics when you are done.
Eastman 804D two point, blonde
Nothing is fool proof for a talented fool