It is a composition of SiO2, which suffers from a great white color and an expanded variety of its varieties of Oxides and Silicon. Its varieties are:
- Pink Quartz
- Amethyst
- Citrine
- Sapphire Quartz
- Smoked Quartz
- Rock Crystal
- Green Quartz
- Tiger's Eye
- Cat Eye
- Hawk Eye
- Aventurine
- Quartz Lemon - Yellow
- The chemical and physical properties of the varieties named are the same as quartz.
- All have a Hardness of 7.
- All varieties named are Oxides
- All are soluble in HF (hydrofluoric acid)
- All minerals are Hexagonal
- There is a variety of Smoked Quartz, which is called Morion
