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#Alumunium
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Alumunium juga nih, penting banget sampe sekarang (pinterest.com)
Alumunium pertama kali diolah pada tahun 1825 oleh Hans Christian Orsted. Saat itu, teknologi pemurnian alumunium belum seefisien sekarang. Makanya, harga alumunium bisa lebih mahal dari harga emas.
Pada tahun 1850-an, alumunium memiliki harga yang lebih mahal dari emas. Harga alumunium per kilogram saat itu mencapai 1.200 dollar AS. Sementara emas hanya 644 dollar AS per kilogram.
#Cengkih
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Cengkih juga pernah lebih mahal dari emas (theayurveda.org)
Sejak runtuhnya Konstatinopel pada abad ke-15 silam, jalur perdagangan rempah dari Asia Selatan sempat terputus. Situasi itu menyebabkan harga rempah-rempah dunia melonjak tinggi. Salah satunya adalah cengkih.
Harga cengkih kala itu naik hingga 50 persen. Dari 35 real jadi 70 real. Harga cengkih itu setara dengan 7 gram emas loh.
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