context: Quartz or quartz is a mineral whose discovery dates back to the French (Pierre Curie) and his brother (Jacques) who were studying a sample of sand in the year 1880 when they noticed a strange phenomenon, which is that when exposing the quartz (silicon dioxide) to a mechanical voltage It generates an electric current, and vice versa. If the quartz crystal is exposed to an electric field, it oscillates and vibrates at a certain frequency. It was also found that this vibration and oscillation is characterized by regularity and high accuracy. This phenomenon, which is known as biselectricity, enabled researchers to manufacture a lot of sensitive devices, the most important of which are watches designed to measure time with high accuracy, as the share of quartz in the watch industry has reached more than 85% of the global watch market. The first model of a quartz watch dates back to 1967, when this watch was produced by researchers at the Electronic Watch Center in Neuschtel, Switzerland, and in 1969 the first quartz watch was made in Japan by Seiko of Japan under the name Astron.
question: Who is the quartz or quartz finder?
answers.text: (Pierre Curie) and his brother (Jacques)