Table Salt Crystals

Table salt takes a few days to grow.

Table salt crystals.

You can see the shape of a salt crystal under a microscope and you can grow your own salt crystals for fun or for a science fair. Table salt also known as sodium chloride is a crystal a symmetrical solid substance made entirely of the same material. Alum grow quickly sometimes making visible crystals within a few hours. Epsom salt grows into smaller needle like crystals but grows more quickly than table salt.

Buy it at a pharmacy. Iodized salt won t work as well but will still form crystals. This activity and more salt science experiments can be found in an salt science activity sheet made as part of a collaboration with the primary science teaching. We also made coloured salt by adding a little food colouring.