Method and means of rapidly distinguishing a simulated diamond f

Details Method and means of rapidly distinguishing a simulated diamond f Method and means of rapidly distinguishing a simulated diamond f

1978-04-10

1981-03-17

Goldstein, Herbert

Measuring and testing

Gas content of a liquid or a solid

By vibration

G01N 2518

Patent

active

042559626

ABSTRACT:
A simulated diamond such as crystalline cubic zirconia, which has optical properties very similar to natural diamond and so is difficult to distinguish optically from natural diamond, is distinguished from natural diamond by measuring its thermal conductivity which is significantly different from the thermal conductivity of natural diamond, by measuring the temperature of a heated probe held against the simulated diamond as an indication of the simulated diamond thermal conductivity. In a preferred embodiment of the present invention, a controlled amount of heat energy is generated at the probe and thereafter, while the probe is held against the simulated diamond, the temperature of the probe is detected as a measure of relative thermal conductivity of the simulated diamond to the natural diamond.

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Schulte E. H., "Pulsed Thermal Comparator for the Measurement of Thermal Conductivity", Conf. Therm. Conductivity, Pap. 9th, 1970, pp. 589-598.

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