Snowflakes are crystals of ice that fall from the sky in winter. While they are not typically called "crystals" in everyday language, they are scientifically classified as hexagonal crystals.

Here's why snowflakes are fascinating:

* Unique Structure: Each snowflake has a unique six-sided structure due to the crystalline nature of ice.

* Formation: Snowflakes form when water vapor in the atmosphere freezes around a tiny dust particle, and as they fall through the clouds, they collect more water vapor and grow.

* Variety: The shape of a snowflake is influenced by the temperature and humidity of the air it falls through, leading to a wide variety of intricate patterns.

Let me know if you have any other questions!