Chemistry of inorganic compounds – Carbon or compound thereof – Elemental carbon
Patent
1978-03-10
1981-11-17
Meros, Edward J.
Chemistry of inorganic compounds
Carbon or compound thereof
Elemental carbon
63 32, 501 86, C01B 3106
Patent
active
043011349
ABSTRACT:
Diamond crystals of controlled impurity content and/or impurity distribution and reaction vessel configurations for the production thereof are described. Combinations of "dopant", "getter" and "compensator" materials are employed to produce gem stones of unusual color patterns, or zoned coloration, using specific reaction vessel configurations.
REFERENCES:
patent: 3142595 (1964-07-01), Wentorf
patent: 3148161 (1964-09-01), Wentorf et al.
patent: 4034066 (1977-07-01), Strong et al.
patent: 4042673 (1977-08-01), Strong
Lih "Color Technology" Chemical Engineering, Aug. 12, 1968, pp. 146-158.
"Jewelers' Circular-Keystone" Jul. 1970, pp. 186-189.
General Electric Company
Meros Edward J.
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