How Will You Describe Quartz?
How Will You Describe Quartz? Quartz, the commonest of all minerals, is made of silica. It is found in most kinds of rocks in colorless, often transparent form. There...
Read MoreHow Will You Describe Quartz? Quartz, the commonest of all minerals, is made of silica. It is found in most kinds of rocks in colorless, often transparent form. There...
Read MoreWhat Is Shale? Shale is a fine-grained, earthy, sedimentary rock rather like clay, but, unlike clay, it is formed in thin layers. It is usually harder than clay and...
Read MoreHow Did the White House Get Its Name? The home of the president of the United States gets its name from its white walls. But the White House wasn’t always white,...
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