snow crystal; snowflake
Refers to an individual ice crystal that forms snow, often used in scientific or descriptive contexts. In everyday speech, 雪の結晶 is more precise than 雪片 (snowflake as a cluster).
Snow crystals have a hexagonal shape.
I observed snow crystals under a microscope.
Compound of 雪 (snow) + の (possessive particle) + 結晶 (crystal). The term is transparent and modern.