https://scitechdaily.com/unveiling-the-mystery-how-contaminated-aluminum-oxide-turns-into-precious-sapphires/ Science, Space and Technology News 2024 Mon, 12 Aug 2024 04:17:34 +0000 hourly 1 https://wordpress.org/?v=6.6.1 https://scitechdaily.com/unveiling-the-mystery-how-contaminated-aluminum-oxide-turns-into-precious-sapphires/#comment-855471 Mon, 12 Aug 2024 04:17:34 +0000 https://scitechdaily.com/?p=402327#comment-855471 IF H2O that is part of the terrestrial water cycle is enriched in the light 16O isotope and sea water is enriched in the heavier 18O isotope. And Deep crustal rocks have more O-18 than melts from the Earth’s mantle. Then Deep crustal rock are in contact with sea water! RIGHT…

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