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![Sapphire - Wikipedia, the free encyclopedia](https://www.iarticlesnet.com/pub/img/site/s_51.jpeg)
Sapphire - Wikipedia, the free encyclopedia
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日期:2024-07-25
Sapphire (Greek: σάπφειρος; sappheiros, 'blue stone',[2] which probably referred instead at the time to lapis lazuli) is a gemstone variety of the mineral corundum, an aluminium oxide (α-Al2O3). Trace amounts of other elements such as iron, titanium, chro...看更多