Trillion Shape: It is a triangular shaped diamond with 50 facets. Trillions are more commonly used as sides stones.
Trillion shape: A triangular shaped brilliant cut with slightly curved sides and culet facets.
Very good cut: The top 15% of quality diamond cuts. A cheaper version of an ideal cut, it also reflects most of the light passed through the stone.
Shape of a diamond other than round. Comprises of heart, marquise, pear, oval, emerald and trillion shapes.
Feather
Fracture in a diamond resembling the form of a feather ...
if it was simply a heat treatment acting upon elements already within the stone, the internal color pattern would not follow the shape of the cut stone exactly. There is no mine that produces rough orange sapphires in a perfect trillion shape (see ...
 See also: Pink, Crystal, Shape, Jewel, Rough
  
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