Borax Crystal Ornaments | Christmas Science

I love growing crystals. Makes sense, right? My name is Crystal. Perhaps this is why I have always been drawn to chemistry. But really, if you haven’t grown crystals before you need to do it today. The results are completely awe-inspiring and gorgeous, and it’s a really easy process. I have gone a bit loco crazy growing crystals since we did this science activity, as you’ll see in my posts in the coming weeks. For today, we made our own crystallized borax Christmas tree ornaments and, I have to tell you, they are stunning.

Borax Crystal Ornaments | Christmas Science | Star

Total Time: About 20 minutes to prepare and then several hours to wait for the crystals to form.

Safety Concerns: You will need to boil water for this. Just watch the kiddos!

Materials You Need:
Pipe Cleaners
Festive Cookie Cutters
Mug, vase, or jar
Boiling Water


    • Bend your pipe cleaner into your desired shape. We did this by using cookie cutters as a guide as seen below.
    Borax Crystal Ornaments | Christmas Science
    • Tie a piece of string to your pipe cleaner shape. You can use string, yarn, or even dental floss if you want!
    • Attach the string to a pencil, pen, spoon, or other long object and set aside.
    • Fill your jar or vase with boiling water. Add 3 TBSP borax per cup of water and stir. It’s okay if some borax settles on the bottom of your container.
    • Lower your pipe cleaner shape into the hot water/borax mixture. Make sure it is not touching the sides or the bottom of your container, and that you can get it through the mouth of your container easily. Feel free to trim or bend your shape accordingly. It is fine to have two ornaments in one large container just as long as they don’t touch.
    Borax Crystal Ornaments | Christmas Science
    Borax Crystal Ornaments | Christmas Science
    • Make sure your jar is in a quiet place where it won’t be disturbed. You don’t want it to get jostled or bumped at all while the crystals are growing.
    • After a couple of hours you will start to see crystals growing! Leave your mixture overnight for best results, or remove your ornaments after just a few hours if you just want a light dusting of crystals.
    • Let your ornament dry on a paper towel for an hour or so. Then pick it up and admire it in the sunlight. Seriously, the crystals are intricate and gorgeous. You will want to grab a magnifying glass to observe them more closely!

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    The thing I was most surprised at is how sturdy these are! I thought they would be delicate and fragile, but they are deceptively hardy. Also, they look edible, but they aren’t. I even found myself tempted to gnaw on them. Don’t do it.

    Borax Crystal Ornaments | Christmas Science

    Crystal science is amazing. The word crystal actually refers to any material that is arranged in an ordered form. Some crystals (like borax) are arranged into little cubes. Other crystals (like snowflakes) have six different arms. You can grow crystals from many substances including salt, sugar, epsom salt, baking soda, and borax. In most of my undergrad chemistry labs the last step was to crystallize the product so we could weigh it. I’ll tell you, though, these borax crystals are much easier to grow than most of the substances we had to grow in my lab, and they are more beautiful, too!

    Borax Crystal Ornaments | Christmas Science

    I love the way these ornaments reflect the light on our tree. The crystals give the shapes a delicate frosty look.

    And, yes, I know we have a very obviously fake Christmas tree. And, yes, I know this ought to get me kicked out of Portland and banned from ever returning. But it’s still kinda pretty, right? RIGHT?!

    So now you have a big box of borax. What else can you do with it? How about making some slime? Or crystallizing more stuff like I’ve been doing all week? Let me know what you are up to in the comments!

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    Borax Crystal Ornaments | Christmas Science

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