Hi Noel - Your sculptural project sounds very cool!
I'd like to recommend Swarovski crystals. They add a lot of flash
and sparkle, and are relatively inexpensive. They come in a variety
of shapes and colors which could add convincing detail to the piece.
For the most sparkle and flash, use beads that are Aurora Borealis
(AB) coated. They coat one side of the bead with this and it adds
just an extra zing of flash. They also make other interesting
coatings, but for the quantity you'd need, the AB is the best buy
because it's the least expensive coating, as well as the best for
This place has good prices and a lot of colors and shapes, with a
minimum purchase of $75, plus discounts on quantities:
Another place with a good selection and good prices, with a better
color chart, and I'm not sure about a minimum, or if they even offer
Also look at pages 193 and 194 there, also.
Let us know what you decide to use.