Rough Granite is a coarse -grained igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. ... It forms from magma with a high content of silica and alkali metal oxides that slowly solidifies underground...
People purchase rough gemstones for a number of reasons. Rough gemstones can be a viable investment, collecting them makes a fun hobby, and they can also be used in jewelry making. Many people buy gemstones simply for the enjoyment of owning and...
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