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
George Stone (bishop) that nobleman became Lord Lieutenant of Ireland in 1731. In 1733 Stone was made Dean of Ferns, and in the following year he exchanged this deanery for that of Derry. In 1740 he became Bishop of Ferns and Leighlin, in 1743 Bishop of Kildare, in 1745 Bishop of Derry, and in 1747 Archbishop of Armagh. During the two years that he occupied the See of Kildare he was also Dean of Christ Church, Dublin. From the moment that he became Primate of All Ireland, Stone proved himself more a politician than an ecclesiastic. "He was said to have been selfish,