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Spring 1964, A hollow back diamond in closed molded setting to simulate pavilion, p. 150, 3pp.
Spring 1964, Pink diamonds and their characteristics, p. 155, 1p.
Summer 1964, Coated Diamonds, by E. Miles, p. 163, 6pp.
To strengthen the piece, the hollow back is filled with an epoxy-like substance; and to hide the deception, the piece is then mounted in jewelry with the back hidden (Kammerling and McClure, 1995; Hughes and Slavens, 1999).
 See also: Jewel, Surface, Size, Spectroscope, Imitation
  
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