It starts with a simple, yet revolutionary concept: a watch that never needs a battery. Citizen Eco-Drive technology harnesses the power of light-from any natural or artificial light source-and converts it into energy.
Solar cells convert sunlight directly into electricity. Solar cells are often used to power calculators and watches, such as the Citizen Eco-Drive watches. They are made of semiconducting materials similar to those used in computer chips. When sunlight is absorbed by these materials, the solar energy knocks electrons loose from their atoms, allowing the electrons to flow through the material to produce electricity. This process of converting light (photons) to electricity (voltage) is called the photovoltaic (PV) effect.
The accepted standard for describing diamonds is called the "4 C's of Diamonds," which are Color, Clarity, Cut, and Carat Weight.