Final answer:
The 4 colors of quartz are Amethyst, Citrine, Rose quartz, and various other colors.
Step-by-step explanation:
The 4 colors of quartz are:
- Amethyst: This variety of quartz is purple in color and is caused by trace amounts of iron and aluminum in the crystal structure.
- Citrine: This variety of quartz is yellow to orange in color and is caused by heat treatment of amethyst or smoky quartz.
- Rose quartz: This variety of quartz is pink in color and is caused by trace amounts of titanium and manganese in the crystal structure.
- Other colors: Quartz can also occur in green, red, orange, and brown varieties.