石英 (Quartz)

Quartz is the most abundant mineral found on Earth's surface and exists in a vast array of colors and crystal forms, making it one of the most diverse gemstones and minerals. Pure quartz is colorless and transparent, but various impurities can create different colors, such as amethyst (purple), citrine (yellow to orange), rose quartz (pink), and agate (banded varieties). Quartz has a hardness of 7 on the Mohs scale, making it quite durable and suitable for various applications, from jewelry to certain industrial uses. It also holds significance in spirituality and is used in crystal healing practice