Many dealers insist that a stone must show a reddish pleochroic color to be called imperial topaz. The reddish pleochroic color often appears at the ends of fashioned gems—like pears and ovals—that ...

The quest for the largest permeates all societies and disciplines. With the advent of new machinery and techniques, size records for faceted gemstones are falling constantly. Currently, a 22,898-ct ...

Others, however, suspect topaz is named after the Greek word "topazos," the International Gem Society reports. Besides yellow, the stone comes in a range of hues, including blue, pink, violet ...