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This pink diamond contains inclusions of garnet and a mineral called pyroxene [py-roks-seen]. Do you recognize the reddish garnet on the right? - Photo by John I. Koivula/GIA
This is a brownish yellow diamond with an interesting cloud that contains many tiny, string-like inclusions. - Photo by John I. Koivula/GIA
Do you see the white, parallel streaks in this purple-pink diamond? This is called graining. It’s caused by small changes in a diamond’s crystal structure as it grows. - Photo by Vincent Cracco/GIA

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