Which term is an instrument that measures thermal conductivity to help separate natural and synthetic diamonds from most simulants?

Which term is an instrument that measures thermal conductivity to help separate natural and synthetic diamonds from most simulants?

• A. Symmetry
• B. Thermal tester
• C. Tetrahedron
• D. Surface Graining

Answer: (B)

The main idea here is using a tool that measures how well a gemstone conducts heat. Diamonds have a very high thermal conductivity because of their strong, tightly bonded crystal structure, so they transfer heat much more efficiently than most common simulants like glass or cubic zirconia. A thermal tester applies a small amount of heat to the stone and watches how quickly it responds or cools, giving a reading that helps distinguish real diamonds (natural or synthetic) from simulants. This type of instrument is specifically designed for that purpose, making it the clear choice for separating diamonds from materials that don’t conduct heat as well. The other terms refer to crystal shapes, growth features, or symmetry, none of which are instruments for measuring thermal conductivity.

The main idea here is using a tool that measures how well a gemstone conducts heat. Diamonds have a very high thermal conductivity because of their strong, tightly bonded crystal structure, so they transfer heat much more efficiently than most common simulants like glass or cubic zirconia. A thermal tester applies a small amount of heat to the stone and watches how quickly it responds or cools, giving a reading that helps distinguish real diamonds (natural or synthetic) from simulants. This type of instrument is specifically designed for that purpose, making it the clear choice for separating diamonds from materials that don’t conduct heat as well. The other terms refer to crystal shapes, growth features, or symmetry, none of which are instruments for measuring thermal conductivity.