Overcolor

overcolor A stone with a hue that is overly dark in tone, usually above eighty-five percent.
overtone See orient.
padparadscha Color of the lotus; a light to medium-toned pinkish orange to orangy pink sapphire.

Larger stones tend to be overcolor; that is, so dark in tone as to be virtually opaque. Even though the ideal tone or the gamut limit of green is seventy five percent, chrome of eighty percent tone can be quite beautiful, due to its vivid hue.

See also: Opaque, Gem, Stone, Inclusion, Gemstone