Available in the following stones:
Standard: Aventurine, Amazonite, Amethyst, Carnelian, Rock Crystal, Rainbow mix, Rose quartz, Sodalite, Gold Tiger Eye.
Hi-grade: Citrine quartz, Jade, Peridot.

They come in 5 different sizes:
OA - 28 stones
1W - 56 stones
3W - 132 stones
4W - 198 stones
Oak - 200 stones