Ice Spikes - To see your own ice spikes, make ice cubes in an ordinary plastic ice cube tray, in an ordinary household freezer, but using distilled water, which you can buy in most supermarkets for about a dollar a gallon. We've tried several different freezers, and almost always got some ice spikes to grow.
Vase Fillers: Gems, Cubes, Glass & Beads
Glass Ice Cubes
Ice Spikes - Ice spikes grow as the water in an ice cube tray turns to ice. The water first freezes on the top surface, around the edges of what will become the ice cube. The ice slowly freezes in from the edges, until just a small hole is left unfrozen in the surface. At the same time, while the surface is freezing, more ice starts to form around the sides of the cube.
Crystal - Water-based ice in the form of snow, sea ice and glaciers is a very common manifestation of crystalline or polycrystalline matter on Earth. A single snowflake is typically a single crystal, while an ice cube is a polycrystal.