These are genuine 9 mm Crystal Quartz beads. Quartz is the second most common mineral on earth, making up about 12% of the earth's crust. All quartz is silicon dioxide, but this was not discovered until the early nineteenth century.
In the healing tradition Crystal is a Master Healer stone of power. In the Feng Shui tradition, Quartz can be used anywhere that balance or cleansing is needed, and for grounding, balance, good health, spirituality and protection.