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Author: WikiMatrix
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English[en]
When a trace amount of Cr3+ replaces Al3+ in corundum (aluminium oxide, Al2O3), pink sapphire or red-colored ruby is formed, depending on the amount of chromium.
Indonesian[id]
Jika sejumlah renik Cr3+ menggantikan Al3+ dalam korundum (aluminium oksida, Al2O3, terbentuklah safir pink atau rubi, tergantung kandungan kromiumnya.