rose and brilliant are standard shapes of diamonds. The reflected light
is refracted into a wonderful play of "lightning flashes", and
"sparkling scintillations" as it passes into the air.
somewhat general idea that the quality of shining in the dark is common
to all diamonds is an error founded on the statement by careless
educators, of the truth, that some do. Experiments show that very few
diamonds, either by exposure to sunlight or rubbing, will show any
light in a dark room.
is one of the most important qualities of diamond. Generally, "fine
color" means the absence of color, or pure, clean, colorless,
transparency. Tints of pink and blue are considered extra fine. So also
fine color sometimes means a rich or rare color as the term is usually
applied, as pink, blue, and yellow.
Almost all gems conceal their true beauties in a natural