Yes, it can still chip. However, watch crystals which protect the watch face can be made to resist scratches from everyday wear. Watch crystals made with synthetic sapphire—or a combination of synthetic sapphire and mineral glass—provide the most scratch resistance.
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These watches use a solar conversion panel and an energy cell to provide power to the watch mechanism. The eco-drive watch can use light from any source to generate electrical power. This power is held in a storage cell that does not have the charge/discharge cycle which is typical of most types of batteries, which means eco-drive watches can give long term performance.
The term “jewel” refers to a type of bearing in a watch mechanism. Modern jewels are typically made of synthetic sapphire or ruby. Jewel bearings reduce friction, therefore they offer a high degree of accuracy in timekeeping. The number of “jewels” is often used to characterize the quality of a watch. A watch with 17 jewels or more would indicate a high quality, precision watch. Jewels in watches have little monetary value.
The term “waterproof” has not been used to describe watches since the late 1960s. “Water resistant” is now the term used to describe a watch’s resistance to an ingress of moisture. A watch receives a water resistance rating based on laboratory pressure tests. These tests simulate the water and pressure a swimmer or diver is subjected to under static conditions. However, it’s important to note that most water activities will subject a watch to motion and various temperatures and water pressures, all of which are dynamic in nature. That’s why many manufacturers and watch makers suggest you purchase a water resistance rating that is two levels beyond the static rating you would select for your anticipated use. You may see these “levels” of water resistance sometimes expressed as “Atmospheres.” For example, a watch rated for:
3 Atmospheres (100 Feet or 30 Meters) can withstand splashes or brief immersion in water, but may not withstand the rigors of swimming.