why do snowflakes all look the same?

Question: why do snowflakes all look the same?
- Keywords:
  appearance,
  ice,
  snowflake,
  structure
Asked by supercookieninja to Claire, Kate, Matt, Rob, Sam on 24 Jun 2013.
- Sam Geen answered on 24 Jun 2013:
  
  Actually, they don’t – there are many, many ways for snowflakes to make patterns, and it’s almost impossible to make snowflakes the same. But if you don’t look closely, then I suppose all snowflakes look like white blobs.

Question: why do snowflakes all look the same?