sapphire crystal
Scratch-resistant watch cover
Sapphire crystal is synthetic corundum used as a transparent covering for watch faces, phone screens, and optical instruments.
Second only to diamond in hardness, it resists scratches far better than ordinary glass: The watch features a sapphire crystal that won't scratch from everyday wear.
Despite the name, it contains no actual sapphire gemstone—just the same aluminum oxide compound grown in a lab.
- bluePrimary color; also sad
- deep blueSaturated dark azure
- gemPolished precious stone
- precious stoneRare, valuable mineral specimen
- watchglassTransparent cover protecting dial
watch face · Swiss watch · corundum · hardness · brilliant · clarity · transparent · scratch-resistant · luxury · royal jewels · timepiece · faceted · precious · cornflower · Kashmir · Ceylon · ruby · jewel
- timekeepingclock, watch, watches, clocks, timer
- watcheswristwatch, pocket watch, analog watch, digital watch, mechanical watch
- SmartwatchesApple Watch, Fitbit, Garmin, Samsung Galaxy Watch, fitness tracker
- clock partswheel, mainspring, pendulum, escapement, dial
sapphire, crystal, sapphires, crystals, crystalline, crystallize, crystallization, crystallography