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black diamond

chem. diamant noir; carbonate m
met. bort m
 English thesaurus
black diamond
jewl. Carbonado is a natural polycrystalline diamond that is usually found in alluvial deposits - sand and soil sediment deposited by running water often along river banks - in central Africa and Brazil. These diamonds are generally dark grey or black in color
Black Diamond
chem., abbr. BD
black diamond
: 4 phrases in 2 subjects
Chemistry3
Transport1