Quartz

==Quartz is the second most abundent mineral in the Earth's crust. It is made up of SiO4(Silicon-Oxygen Tetrahedra). There are different kinds of Quartz like Citrine, Rose Quartz and Amethyst. The streak is white, the fracture is conchoidal, the hardness is 7 and the luster is vitreous.==

==This kind of Quartz is called Citrine. The color ranges from pale yellow to brown. Rio Grande Do Sul ( which is in Brazil) produces Citrine. Sometimes Citrine and Amethyst can be found together in the same crystal. Citrine is also one of three traditional birthstones of November.== ==﻿==

==﻿This kind of Quartz is called Rose Quartz. The colour ranges from pale pink to rose red. If it's found as a crystal, it's called pink Quartz. The first pink Quartz was found in Rumford,Maine. Rose Quartz is carved into things like people or hearts.==

==﻿ This kind of Quartz is called Amethyst. The colour ranges from bright or dark purple. Amethyst is also used for jewelry. Greeks and romans made drinking vessels out of Amethyst so they wouldn't get toxicated.== ====