Under a magnifier, many crystals show orderly facets instead of a soft, random lump.
Tap the loose pieces. Follow the arrows: each particle snaps into a matching open site.
Add layers. Repeated rows line up, so the outside planes stay flat as the model grows.
Tap between two lattices. Their allowed growth directions are different, even with equally tidy order.
The mystery particles begin in an unlabeled slanted repeating net. No outer crystal has grown yet.
A mystery lattice repeats in tidy slanted rows.
Which rim will many complete layers build?
Choose, then add complete layers around the mystery seed.
experiment ready
