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Gemology
Examining a pink sapphire under a gemmological microscope
Examining a pink sapphire under a gemmological microscope
Gemmological travel lab KA52KRS
Gemmological travel lab KA52KRS
A selection of ornamental, non-precious stones made by tumbling rough pebbles with abrasive grit in a rotating drum. The biggest pebble here is 40 mil
A selection of ornamental, non-precious stones made by tumbling rough pebbles with abrasive grit in a rotating drum. The biggest pebble here is 40 millimetres (1.6 in) long.
Traditional handheld refractometer
Traditional handheld refractometer
Its low cost and close visual likeness to diamond have made cubic zirconia the most gemologically and economically important diamond simulant since 19
Its low cost and close visual likeness to diamond have made cubic zirconia the most gemologically and economically important diamond simulant since 1976.