Rough Diamonds

Type I
	Ia	Ib
Prevalence	98%	0.1%
Color centers	Clustered Nitrogen atoms	Isolated Nitrogen atoms
color	Colorless Yellow	Orange Orange Yellow Brown

Type II
	IIa	IIb
Prevalence	1-2%	0.1%
Color centers	No specific color center	Boron atoms
color	Colorless Yellow Brown Pink Purple	Blue Gray

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