Because My Life Doesn't Have Enough Noise: Rock Tumbling in Progress

 Originally, I just wanted to tumble some of the rocks that the kids and I collected on our Michigan adventure this summer. 

But then when I found the rock tumbler in the garage, I also found a neat little pile of rocks that I set next to it to tumble in some other, long-ago life. 

When did I do such a thing? What distracted me from finishing? 

Honestly, it could have been anytime in the past seven years, and anything from a global pandemic down to a cute cat walking up and asking for pets could have distracted me. Literally yesterday, while digging through my fabric bin searching for Halloween prints, I came across the flat sheet I bought to make bedroom curtains as a pandemic project. I had sewed the curtains for the bigger window, and then a squirrel ran by or I got hungry for a snack or something and I completely forgot about sewing the curtain for the smaller window... EVEN THOUGH I ALREADY HAD ALL THE MATERIALS!!!

So after I found the Halloween prints I was looking for, I sat down and finished sewing the sheet to the blackout fabric. It took maybe ten minutes, and that includes setting up the sewing machine and threading a bobbin. 

Now that that's done, back to rock tumbling!

Here, then, is the combination of Michigan rocks and previously collected rocks that I added to the tumbler barrel:

I added coarse grit and some plastic pellets, then set up the world's noisiest rock tumbler out in the garage:

Just... don't even try rock tumbling if you don't have a garage or basement or someplace VERY far away from the rest of humanity. It. Is. So. NOISY!!!

Here are my nice little rocks two weeks later!

And here they are rinsed off:

They look shinier than they are because they're still wet, but still, I'm very pleased with how much nicer they are already:

I had trouble getting all the grit rinsed out of every rocky little nook, so I put them back in the tumbler with a couple of squirts of dishwashing liquid and some more water--

I'll rinse them again tomorrow and start them with medium grit.

Now I should probably go do that Halloween sewing project before a kitten walks by and I'm distracted until next Halloween...

Make Sea Glass in a Rock Tumbler

This tutorial was originally published on Crafting a Green World back in 2016.

Yes, you can 100% make sea glass in a rock tumbler. It's super easy, and it comes out straight-up looking like sea glass. 

Here's how to do it.

How to Make Sea Glass in a Rock Tumbler

You will need: 

  rock tumbler. You want a good-quality metal one, something along the lines of the Thumler's Tumbler that we own. Good rock tumblers are pricey, but they make a great gift for a science-minded kid, so much so that if you don't have a science-minded kid of your own, someone you know probably has one and may in fact have a rock tumbler that you can borrow. 

  filler. This takes up the spaces between the glass pieces. You can use either ceramic media or plastic beads, both of which can be re-used. 

  coarse grit. Unlike rock tumbling, which requires coarse grit, fine grit, pre-polish, and polish, making sea glass in a rock tumbler only calls for coarse grit. 

  broken glass. You don't want anything too thin, like microscope slides, because the rock tumbler will abrade it so that it's too thin to be useful. I had great luck with vintage glass bottles, however. 

  hammer and towel. Gotta break that glass somehow! 

  tile nippers. These aren't necessary, but if you want to shape or trim your glass at all, you need them.

 1. Break some glass. As I mentioned before, I'm using vintage glass bottles to make sea glass, because that's what I have a million of and need to find more things to do with. I'm primarily choosing either the glass bottles that were broken when I found them, or that are of unimportant provenance. I clean up and polish the nice vintage glass bottles and display them around my house, even though I've frankly got too many of those, as well. 

 ANYWAY... my preferred method of breaking a glass bottle is to wrap it in a towel, set it on my driveway, then whack it with a hammer. From the mess of broken glass, I pick out the nice pieces that I want to tumble. I really like bottle necks and bottle bottoms (ahem...), and also the side pieces if they've broken into a shape that I think will look nice when tumbled. 

 Use the tile nippers to trim a piece of broken glass into a more interesting shape, or chip off the edges around a bottle's bottom. 

  2. Set up the rock tumbler. Use these instructions to make your tumbled glass. Note, however, that the instructions explicitly tell you not to use glass bottles. My experience is that you can, although you still want to avoid any glass that's too thin. A Coca-Cola bottle should work. A spaghetti sauce jar probably won't. 

 3. Check your work. When you open up your rock tumbler after five or so days, the inside will look like this:  

Instead of sifting out the tumbled glass, I pick it out of the matrix and examine it. A couple of times, a piece has cracked and needs to be set aside. Sometimes, a piece is perfect just the way that it is and I love it. Most times, though, the tumbled piece is almost perfect, but still needs some refining. For that, get the tile nippers back out. 

 For instance, after examining that bottle neck in the above photograph, I decided that I'd like it better if it was trimmed even closer to the edge, so I did: 

 4. Go for round #2. Pop any glass that you've trimmed, and enough new pieces to maintain the level in your tumbler, back into the barrel with the same grit and filler material. Give it a go for another five or so days, and then take a look. 

Repeat until you're happy!