Good ol'garnets sure are a great addition to gold. Coarsegold here in the Motherlode has some of the richest deposits of multi-colored garnets I've ever seen. Made quite a few jewelry pieces fulla gold and garnets---nice pix-and thanx mucho-John
Great pictures man. I think you have several spessartite garnets there (the orange ones). I also see some red almandine garnets, and picture 4 shows at least one well formed clear topaz (the square one). The pink stones could be morganite ( a variety of beryl), I would really try to get a hardness test done on one of those.
The black crystal's shape you photographed reminds me of psuedobrookite with it being tabular and elongated ( for example: http://www.mindat.org/photo-123063.html ) though it could be many other things as well, perhaps even simply schorl.