How to Make Epsom Salt Crysals

Introduction: How to Make Epsom Salt Crysals

This is my first instructable, so take it easy with the comments

Step 1: What You Need:

You Will Need:
1/4 cup (container)of Epsom Salts (Magnesium Sufate)
1/2 cup (container) of tap water
Shallow bowl or dish
Food Colouring (optional)
Sponge (optional)
Time (it took me three days, but it depends on sunlight)

Step 2: Water Boiling

1)Boil the Water in a microwave, kettle or stove, when it is boiled, add epsom salts and food colouring(optional)

Step 3: First Stages of Growth

Pour the mixture over the sponge or the container and place it in a warm and sunny location.

Step 4: Ta Da

Your Crystals should appear as the water evaporates.



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    26 Discussions

    i am making them for my girlfriend on a necklace put string in deep water with epsom salts and it grows up the string and i will buy a necklace chain off ebay

    table salt is not the same thing as Epsom salt. Table salt: NaCl; Epsom salt: MgSO4. Due to the nature of its elements and their bonds, table salt will not form crystals such as these.

    water wont boil in the microwave, it will make a mess. because in a microwave the water is heated past its boiling point before it has a chance to boil. i saw this somewere but dont remember were

    1 reply

    Water most certainly will boil in a microwave. The superheating issue only really comes into play if the container lacks enough nucleation sites to get a good boil going. I boil water nearly every day in the microwave, 2 cups/500ml will boil in my microwave in approximately 3 min give or take 10 seconds. That said, I have used very very clean erlenmeyer flasks to superheat water and cause a crazy eruption upon agitation in a microwave too. The erlenmeyer works really good for this due to the narrow neck allowing a slightly higher pressure in the vessel. It's pretty damn cool really, but also dangerous you can burn yourself quite badly if you are not very careful

    I think the children at my playcentre will enjoy making this project plus the ingredients are safe for them to handle. will keep you updated on progress thanks

    Try They offer lots of raw materials such as epsom salt, citric acid, lye, oils, waxes. They offer lots of products for soapmakers or crafters.

    How do you get your crystals to grow tall? I tried this as an arts & crafts project at work, and all of our crystals stayed quite flat to the bottom of the bowl. Also, are they supposed to break apart if you touch them? Many thanks for any advice.

    georg I don't blame you for having no pictures I did and I'm stile being beaten up about my first instructables

    it should be available at your supermarket or local pharmacy. It would normally be sold as "epsom salts" though (like he says at the start) shouldn't be very expensive to do as well :)


    I WOULD like to see more pictures though, but this is still cool, hopefully I will try out this awesome Instructable.
    +1 rating.

    Maybe some more pictures would be nice. The instructable just seems empty the way it is.