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Showing 1 to 1 of 1 for “"high-pressure–high-temperature treatment"”.
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Survival of Brown Colour in Diamond During Storage in the Subcontinental Lithospheric Mantle
… clusters as the cause of brown colour. Brief treatment in a high-pressure–high-temperature (HPHT) vessel at 1800–2700 °C can destroy the brown colour. There has been speculation that similar colour removal should occur continuously at depth in the SCLM. Diamonds are stored at 900–1400 °C in …