Gemstone the stone such as color zoning (the uneven distribution of coloring within a gem) and asteria (star effects). The Greeks, for example, greatly valued asteria gemstones, which were regarded as powerful love charms, and Helen of Troy was known to have worn star-corundum. Aside from the diamond, the ruby, sapphire, emerald, pearl (not, strictly speaking, a gemstone), and opal have also been considered to be precious. Up to the discoveries of bulk amethyst in Brazil in the 19th century, amethyst was considered a "precious stone" as well, going back to ancient Greece. Even in the last century certain stones such
Stone City, Iowa Stone City, Iowa Stone City is an unincorporated community and census-designated place in Jones County, Iowa, United States. Stone City began as a company town for the workers of the local quarries. Stone City is known for its Anamosa Limestone quarries, historic limestone architecture, and 1930's art colony. Stone City was founded in 1850 along the banks of the Wapsipinicon River. Early settlers discovered dolomite limestone at the location. In its earliest history Stone City was known as the Anamosa Quarries. Later the area became known as the Stone City Quarries. In the late 1800s, Henry Dearborn, John Green, and