Why are semi-precious gemstones so valuable?
Deep within the planet, geological processes are like a giant furnace, transforming ordinary rocks and minerals into amazing semi-precious gemstones. Every semi-precious stone has millions of years of history, and their creation process is both amazing and enigmatic, which drives people to want to investigate it. From the scorching mantle to the cold crust, from explosive volcanic eruptions to mild seaflower sediments, the production of semi-precious stones is inseparable with


