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
Mason S. Stone Montpelier's Green Mount Cemetery. Stone also authored several books, including a history of education in Vermont. Mason S. Stone Mason Sereno Stone (December 14, 1859 – July 13, 1940) was a Vermont educator who served as state Superintendent of Education. From 1919 to 1921 he was Lieutenant Governor of Vermont. Mason Sereno Stone was born in Waterbury Center, Vermont on December 14, 1859. He worked as a teacher, principal and school superintendent, and received a bachelor's degree in 1883 and a master's degree in 1909, both from the University of Vermont. He served as Vermont's Superintendent of Education from 1892