While some coloured diamonds undergo treatments such as irradiation or high-pressure high-temperature (HPHT) processes to enhance or alter their colour, truly natural fancy coloured diamonds are prized for their untreated, natural coloration.
While some coloured diamonds undergo treatments such as irradiation or high-pressure high-temperature (HPHT) processes to enhance or alter their colour, truly natural fancy coloured diamonds are prized for their untreated, natural coloration.