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Home made crystal plantation – growing crystals

Instead of flowers on your windowsill, you can grow … a crystal necklace. Yes it is possible! In this experiment, we will replace the pot with a jar and the seeds with salt. Ready to set up your home crystal plantation? That`s great! Let`s get to work and create something thanks to science.

For this (we can call it ‘scientific’ without hesitation) experiment please prepare:
  • jar
  • table salt (without anti-caking agent)Instruction how to make crystal plantation at home
  • stickhairy
  • threadhot
  • warm water
  • spoon
  • paper clip
  • food dye (optional) if you want your crystals colorful

Now you`ll find out how to grow crystals.

Instruction for growing crystals at home:
  1. Pour warm water into the jar half the volume.
  2. Pour a few tablespoons of salt and mix so that the salt dissolves in water.
  3. Add salt until the water is saturated. If, despite mixing, the salt no longer dissolves, then stop adding it. You can add a dye.
  4. In the center of the stick, tie a thread with a weight attached, e.g. a paper clip.
  5. Lay the stick on the edge of the jar so that the string is submerged in water.
  6. Store the brine in a safe, dry place, e.g. on a window sill. After a few days, crystals should appear on the string.

Scientific curiosity:

the longer the evaporation and crystallization process takes place, the larger the salt crystals will be. Therefore, carefully choose a place where the culture will be located and be patient – the colder the conditions, the slower the crystallization and the larger the crystals!
You can use a stick or a cardboard box for home-grown crystals. Will crystals grown with their help differ? We encourage you to find out by yourself. Grow something great 🙂

What does science say about growing crystals?

… (halite = sodium chloride and its crystallization by evaporation)

The formation of crystals of table salt (sodium chloride) in our experiment is called crystallization. We dissolved so much salt in the water that if we tried to dissolve more salt, we would not have succeeded – the salt would settle on the bottom of the container. This is called a saturated solution in the language of chemistry.

When we leave the container, the water begins to evaporate from it, but the salt remains in solution. This normally leads to an increase in the salt concentration in the water, but since our solution can no longer take in more salt, the salt crystallizes to form crystals. Also, lowering the temperature causes that the water is less and less dissolved salt, which leads to its crystallization.

The result of these two processes are beautiful white salt crystals on the thread. The size of the salt crystals depends on the rate at which they are formed – the slower they are growing, the larger they are getting.

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