LTHOUGH we place the
ruby fourth among the precious stones, so few are the superior rubies
in commerce, or that the world sees, that when a perfect ruby of the
weight of ten or more carats enters the market, it brings a price three
times as great as does a diamond of the same weight.
natives of India indiscriminately apply the name " ruby" to all
coloured precious stones, and it is the habit of American dealers in
precious stones to be almost as general in calling various red gems
rubies, although they do distinguish by calling the corundum ruby "
Oriental ruby." This being a book for everyone, other red stones
commonly or even occasionally appearing in the jewelry trade and
called by merchants rubies will be comprehended and described in this
chapter, leading with the corundum reality, which is beyond compare.
Corundum crystallises in the hexagonal sys-