The GEM DiamondMaster and the thermal properties of gems.

Abstract

This instrument measures thermal inertia (not thermal conductivity) of the material being tested. Instrument design is described and illustrated. Thermal properties (including thermal conductivity, specific heat, thermal diffusivity and thermal inertia) along with density are tabulated for several gems, synthetics, simulants and metals. Uses for distinguishing, for example, coloured stones, as well as diamond from its simulants, are discussed.-R.V.D.