The name is from the Greek "akantha" meaning thorn or arrow, in reference to its crystal shape.

Many variables affect crystal shapes, and how they do is difficult to isolate and predict.

Bio-slime in the lake can change crystal shape some, too.

Snowflakes form pretty shapes because that is the crystal shape of water.

Sarel flickered into her crystal shape beside him.

The Windfinder's eyes remained on the flattened crystal shape.

Likewise for sound waves affecting crystal shape during growth.

Kandeels are traditionally built in a crystal shape with tails at the bottom.

Barium titanate goes through two phase transitions that change the crystal shape and volume.

There are other factors that impact snow beyond its moisture content and crystal shape, however.