there is more than 20 t0 25 listed as coloured gem in Gemstone Encyclopedia - International Gem Society

find at sundrench  some colored gem in rings, brooch  and braclets

agate , dark green color

coral , red color

emarld , green color

opal ,white color

moonstone, dark ornage to brown  color

topaz ,very  light blue color

tourmaline , very light brown to yellow color

turquoise, blue  color

the above  image is a multi color pin with coral ,pearl, jade gem stone and black crystals.