Quartz is a very common mineral found in all types of geological environment. It clearly varies in terms of varieties, colors and forms. Some of the macrocrystalline or large crystal varieties are popular as ornamental stones and gemstones. » Amethyst, a purple gemstone » Citrine, a yellow to orange gemstone » Milky Quartz, a cloudy white gemstone » Rock crystal, a clear gemstone » Rose quartz, a pink to reddish pink gemstone » Smoky quartz, a brown to gray gemstone.
