Single crystal chemical vapor deposited synthetic diamond materials having uniform color
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United States of America Patent
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Sep 5, 2023
Grant Date -
Aug 27, 2015
app pub date -
Sep 13, 2013
filing date -
Sep 19, 2012
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Abstract
A coloured single crystal CVD synthetic diamond material comprising: a plurality of layers, wherein the plurality of layers includes at least two sets of layers which differ in terms of their defect composition and colour, wherein defect type, defect concentration, and layer thickness for each of the at least two sets of layers is such that if the coloured single crystal CVD diamond material is fabricated into a round brilliant cut diamond comprising a table and a culet, and having a table to culet depth greater than 1 mm, the round brilliant cut diamond comprises a uniform colour as viewed by naked human eye under standard ambient viewing conditions in at least a direction through the table to the culet.
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