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Diamond cuts

Online G&G articles on diamond grading and cutting

• Summer 1936, The New Line-Cut Diamond, p. 43, 2pp.
• Winter 1936, The new diamond cuts break easier than thicker old cuts, p. 68, 1p.
• Winter 1936, Notes on diamond grading (clarity and color), p. 77, 2pp.
• Summer 1937, Gauges for diamond proportions, p. 109, 3pp.
• Fall 1937, New diamond grading equipment (microscopes), p. 114, 5pp.
• Summer 1939, Increased demand for spready diamonds, p. 24, 1p.
• Fall 1940, Diamond Color Gauge, p. 105, 1p.
• Spring 1942, Evaluating Diamond Make, p. 2, 5pp.
• Spring 1943, Girdle-faceted diamonds, p. 71, 1p.
• Winter 1944, More patents on modifications of the brilliant diamond, p. 184, 1p.
• Spring 1945, New and Old Novelty Styles of Brilliant Cutting, by Shipley, p. 194, 7pp.
• Fall 1945, Diamond Cutting By the Electric Arc Method, p. 263, 5pp.
• Winter 1945, The Diamondscope, p. 285, 4pp.
  • Spring 1946, p. 313, 2pp.
• Summer 1946, The Leveridge Gauge and weight estimation, p. 324, 2pp.
• Summer 1947, The new standard Diamondlite, p. 431, 1p.
• Winter 1947, Estimating weights of recut diamonds with the Leveridge Gauge, p. 486, 4pp.
• Winter 1948, New classification of rough diamonds by De Beers Co., p. 120, 2pp.
• Spring 1950, Diamond Jewelry Through the Ages, p. 267, 11pp.
• Winter 1953, Procedures for Cutting and Grading Diamond, by G. Kaplan, p. 355, 7pp.
• Summer 1956, Modern diamond cutting tools, p. 310, 10pp.
• Spring 1958, Electronic Colorimeter for Diamonds, by Shipley, p. 136, 9pp.
• Summer 1958, Clarity in Diamonds, p. 174, 7pp.
• Spring 1959, A large rose diamond, 13 1/2 mm x l l/2 mm, p. 266, 1p.
• Fall 1959, Another large rose diamond, 15mm x 2.1mm, p. 336, 1p.
• Winter 1961, The new princess cut, p. 250, 1p.
• Fall 1962, Rapid Sight Estimates of Diamond Cutting Quality, by Liddicoat, p. 323, 13pp.
  • Winter 1962, p. 365, 11pp.
• Fall 1962, The 20th Century cut, p. 340, 1p.
• Winter 1963, Estimating diamond weight before and after recutting, p. 118, 3pp.
• Winter 1965, A diamond with 122 facets, p. 360, 2pp., (See also Winter 1966, p. 112, 2pp.)
• Spring 1967, Diamond Proportion Grading and the New Proportionscope (pictured on back cover), p. 130, 7pp.
• Spring 1968, The Optics of Brilliant Cut Diamonds, p. 263, 9pp.
• Fall 1968, A large rose cut diamond fraudulently set in closed-back setting to imitate larger stone, p. 350, 2pp.
• Fall 1969, Modern rose cut diamonds, p. 90, 2pp.
• Winter 1969, Polished or unpolished girdles (?), p. 120, 2pp.
• Spring 1970, Polished or unpolished girdles, p. 161, 1p.
• Fall 1970, Diamond polished nearly parallel to cleavage (grain), p. 230, 2pp.
• Fall 1971, A 20th Century cut diamond, p. 345, 1p.
• Winter 1971, The Barion Cut, a new standard mixed cut for diamonds, p. 366, 4pp.
• Winter 1971, Double girdles to eliminate bearding, p. 372, 3pp.
• Winter 1971, A huge pear-shape rose cut diamond (foil backing to imitate pavilion), p. 375, 2pp.
• Spring 1974, The 144-facet diamond is 32% more brilliant than the 58-facet diamond, p. 259, 12pp.
  • Spring 1974, (the GIA rebuttal to above), p. 271, 2pp.
  • Spring 1974, (the 144-facet diamond is less brilliant than the 58-facet diamond), p. 273, 11pp.
• Fall 1974, A very thin and deep laser hole, p. 347, 2pp.
• Summer 1975, Twinning plane causes polishing problems, p. 46, 1p.
• Fall 1975, Faceting Limits (diamonds and colored stones), p. 78, 10pp.
• Winter 1976, The Various Effects of Faceted Gems, p. 98, 15pp.
• Fall 1977, The New "Radiant-Cut", p. 332, 2pp.