I've been lucky enough to have done arcaeology in Belize, in the highland Maya area. We actually found bone bits and jade, though nothing to the level of the project I had done.

Fun side story- after beign burried 1400 years, bone will desintegrate into small fragments generally indistinguishable from rocks. When we found something that could have been bone or small rock in our sifters, we were encouraged to put it into our mouth. If it stuck to our tongues, it was porus bone. If not, it was a rock and we could spit it out. We were not a particularly high tech site.

The mask I put on my skull was a rough replica of this high classic burial mask from around 800 AD, Palenque. It was made of styrofoam and ceramic floor tiles.

The skull's deformity was a reflection of the ancient mayan cosmetic practice of deforming baby's heads by binging them between planks of wood. Some of the more extreme examples of this practice created skulls not unlike this one below

I also scored the teeth in imitation of mayan dentistry, the more decorative examples of which might look like this: