Sapphire

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         2021/11/26 Jewel bearings: Orbray and the watch industry [Story of Watch 1]
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         2021/10/05 Method for mass production of 2-inch diamond wafers developed - Expected to spur industrialization of power-semiconductor devices
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         2021/08/25 World's First Artificial Diamond Substrate Exposure Experiment in Space
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         2021/08/17 High-quality and Large-diameter Diamond Substrates
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         2021/08/11 The Bright Future Being Created by Diamonds
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         2021/07/13 What are Audio isolation feet? Overview and Effects
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         2021/06/10 What is an audio accessory? An overview and detailed explanation of products [Part 2]
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         2021/06/07 What is an audio accessory? An overview and detailed explanation of products
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         2021/05/24 We were featured on the cover of the journal Diamond and Related Materials.
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         2021/05/07 Diamond and Microridge Stylus
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          Stylus in the Age of SP
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          History of Stylus Tip and Gramophone Record