Function
A main reason to grow crystals is for science projects and classroom demonstrations. Such as growing stalactites and stalagmites, making crystal gardens, creating borax snowflakes and salt crystals. However, there are fun projects too, such as making rock candy and exotic crystal growing.
Time Frame
The amount of time it takes to grow crystals varies, depending on the project you are doing. There are super fast crystal growing techniques that take only a few hours for the crystals to form, while other projects can take a few days, to a few weeks.
Size
The size of the crystals that you grow will vary depending on the type crystals you are growing. You can make clusters of spiky crystals or a snowflake crystal that will be approximately 2 inches across.
Effects
While growing crystals you can also add food coloring to create colored crystal gardens and snowflakes. Crystals can also be made out of alum, chrome and phosphate to name a few.
Warning
When growing crystals, they do come out wet and need to be dried carefully. Also, years of handling them will dull their shine and color.