The closest prefab match to the snowflake pattern is a flower. But you can create the snowflake yourself by cannibalizing a few sheets of plain black hex tiles. Simply pop out the white tile above each flower petal and replace it with a black one secured to the mesh backing with a dot of hot glue.
Unglazed Porcelain Flower Hexagon 1", about $7 per square foot, and Unglazed Black Porcelain Hexagon 1", about $7.50 per square foot; LuxeTile
For step-by-step help with this project, see How to Tile a Floor