Every snowflake is unique, or at least as best as we can figure out. It's probably true that no two snowflakes are alike, but the sheer number of snowflakes makes it virtually impossible to determine with certainty.
The Science Behind Why No Two Snowflakes Are Alike
Model Magic Snowflakes – No Two Alike
Why no two snowflakes are alike
Explorit: Snowflakes, no two are alike, Features
Does It Make Sense to Categorize People by Generation? - The New York Times
Why No Two Snowflakes Are Alike, According to Science
The Science Behind Why No Two Snowflakes Are Alike
No Two Snowflakes the Same Likely True, Research Reveals
Are No Two Snowflakes Exactly Alike?
Is it true that no two snow crystals are alike?
Are All Snowflakes Actually Unique?
How do scientists know that 'no two snowflakes are alike' when all the snowflake haven't been compared with each other? - Quora
BYJU'S - #MythBuster: It is said that no two snowflakes look alike. Is it impossible? No. It's just not very likely because of minute differences in temperature, pressure and humidity. #LoveToLearn
The innovative photos that proved no two snowflakes are alike