During winter, the Northern Hemisphere experiences a natural phenomenon known as "diamond dust." Diamond dust is a type of precipitation that consists of tiny ice crystals or snowflakes suspended in the air, creating a sparkling effect when they catch the sunlight. It's called "diamond dust" because it can resemble the appearance of diamonds glistening in the air. This phenomenon is particularly common in polar regions, and it adds to the beauty and wonder of the winter season.
Reference: National Snow and Ice Data Center. (n.d.). Diamond Dust. Retrieved from https://nsidc.org/cryosphere/glossary/diamond-dust