What is a Watch Crystal, and Why Does It Matter? – Jack Mason
Foxconn to produce sapphire crystal glass for next Apple products | KitGuru
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Ginza, the Tokyo district where the Seiko story began, inspires two watches that celebrate Seiko's 140th anniversary. | Calibre Magazine
Aren't Daum, Baccarat, and Lalique just high-class glass or are they literally crystal? Are they man-made crystal, or mined crystals that are hand-carved? Why is crystal more expensive than glass, or vice