You can always find near the sea in the sands little yellowish-milky crystals of quartz. Quartz is the most abundant mineral found at Earth’s surface, and its unique properties make it one of the most useful natural substances.
You probably may know many varieties of quartz, such as rose quartz, rock crystal, smoky quartz, amethyst, citrine, ametrine, prasiolite, onyx, agate, chalcedony.
Quartz is quite hard crystal, but it can easily be scratched or chipped, so it’s important to be careful not to wear it when you might be engaging in an activity that could harm the stone. The best way to clean your quartz is with a plain water and soap, using a soft brush and then a soft polishing cloth. Do not soak your quartz, and do not leave it in direct sunlight as its color may fade. Also be careful not to expose it to intense heat as this too might cause the colour to fade.