Top Cape - An early trade term still used by some dealers to designate the diamond color grade between crystal and cape in the river-to-light-yellow system.
From Top Cape to Yellow the increasing yellow coloring is clearly perceptible even to the unpracticed eye, so that the descriptions "slightly yellowish" to "yellow" are justified.
" The lowest end of the scale is reserved for the toned colors, which have a more or less intensive yellowish tone and which are known, for example, as "Cape." This yellowish tone is first readily visible in stones graded "Top Cape" and is further ...
 See also: Colorless, Crystal, Table, Inclusions, Group
  
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