Precision Machined Metal Dice

By: on December 28, 2012
$12 - $39
Check It Out

Precision machined dice made from pure, solid metal. Just like my abs. Amber Rix's wildly successful Kickstarter project will reward backers with a choice of 3/4" dice in 7 different unmixed, undiluted material types: Aluminum; Stainless Steel; Brass; Copper; Titanium; Damascus Steel; and--Yahtzee!--Tungsten. All have undergone intensely fancy mathematical calculations to account for their varying weights and Centers of Mass, and to ensure they remain Vegas-standards legal. More on that for the brainiacs out there later.

First, though, a mention that Rix was seeking $3,000 in Kickstarter funding. As of printing, with nearly two weeks left in the project's run, she has amassed over $100,000. Geez, people sure do like their metals and their games of chance.

And second, a rundown of the dice's different metal options, their weights, and pledge requirements. Note that all metals will have a brushed finish.

  • Aluminum. Each die weighs 0.65 oz. A $12 pledge returns a pair anodized in the buyer's choice of Blue, Black, Red, or Clear/Silver.
  • Stainless Steel. Weight of 1.92 oz each. $19 for a pair.
  • Brass. 2.05 oz each. $26 for a pair.
  • Copper. 2.13 oz each. $33 for a pair.
  • Titanium. 1.14 oz each. $45 for a pair.
  • Damascus Steel. Weight not listed. Rix was only able to acquire this pricey, sparsely supplied metal--traditionally used for swords and daggers--for inclusion in her project after backers' astronomical support of it started rolling in. A single Damascus die is $90, and a pair $170.
  • Tungsten. 4.47 oz each. $98 for a single die. $196 for a pair.

Additional funding levels return master sets of precision machined dice, as well as candy assortments of Rix's metals. For $490, you'll get a Game Sample pack with a pair of all 7 kinds of dice she's fabricating. Get your pledge in before the project's close date of January 10, 2013. Anticipated delivery of the metal cubes is March 2013.

So you really want the math?

Fine, let's see how paraphrasing this goes.

Since each die is a single, solid, rigid body, it has a geometric center, or Centroid, that defines its Center of Mass. When considering rolling a die its rotational dynamics come into play, which depend not on its Center of Mass but its rotational inertia, or Moment of Inertia. The Moment of Inertia measures the resistance of an object to rotational acceleration about an axis. Should density or mass vary in distance from the rotational axis, the Moment of Inertia defines the resistance of that object to rotational acceleration.

Rix wanted to minimize the rotational Moment of Inertia of her metals so that, when rolled, her dice would stop at statistically even probabilities for each of the six possible outcomes. She was able to accomplish this using parasolid modeling to calculate the Moment of Inertia, and to instantly make structural modifications that would reduce the differential between the Centroid, the Center of Mass, and the Moment of Inertia of a perfect cube.

Each different metal die's face features (its 1 through 6 dots) have different drill depths to compensate for the mass of the material removed from the opposite face. This allows Rix to use parasolid modeling to match geometric Centroids to their corresponding centers of mass.

November 2013 Update: Rix's machined dice are now available for direct purchase through the CRL Products online store in materials ranging from aluminum to brass to copper. Follow the link below.

Buy Now

Gallium - Melts-in-Your-Hand Metal

$10.63 from Amazon »

The chemical element Gallium does not exist in pure form in nature, but since it's so magical and badass looking all solid-to-liquid-at-the-touch-of-a-human-hand and all, of course man figured out a way to extract it...

Check it out

Throwing Card Knives


Watermelons. You poor bastards. Always on the receiving end of novelty weapon violence. The Gotcha Cap. The Unbreakable Slugger Umbrella. The Blade Driver Crossbow. And now...the Queen of Hearts. That bitch....

Buy Now

Tungsten Sphere

$249 from Amazon »

I'd call the Tungsten Sphere a desktop toy, but given its high density--at just about 2" in diameter the sphere weighs over 3 pounds--I'm not sure how much fiddling or stress-relieving palm rolls you'll be able to do...

Check it out

Rhei Liquid Display Clock

By: Rhei »

First thing's first: if you want to see what's so special about Rhei, fast forward to 1:50 in the above video to bypass the dramatic buildup and jump straight to the action flow....

Buy Now

Drunk Stoned or Stupid

$16 from Amazon »

Usually the only people I credit for being clever, relevant, and hilarious are myself and sometimes Stephen Colbert, but the cards of party game Drunk Stoned or Stupid demonstrate there might be a few others out there...

Buy Now

Exploding Kittens Card Game - NSFW Edition

$19.99 from Amazon »

Unlike run-of-the-mill kitten explosions, Exploding Kittens: NSFW Edition contains content that is not suitable for your workplace or children. And even though no one seems to be saying it, I'm guessing a card game featuring...

Buy Now

Inkless Pen

$21.99 from Amazon »

Adios, pocket protectors! Inkless pens are the way of the future. OK, probably the way of the future is the elimination of pens altogether, in favor of app-controlled telekinetic writing implementations, but in the interim...

Buy Now

Gallium Spoon Mold

$69.99 from Amazon »

Now that you know about the weird science of gallium, you're probably wondering what the WTF you can do with it once you've scored a nugget. My suggestion: spoon gag. Slightly more sophisticated than "Pull my finger"...

Check it out

Titanium & Jack Daniels Barrel Ring

$245 - $345 from Etsy »

I guess I've been in a serious relationship with Jack Daniels for long enough now that I'm willing to don his ring and announce it to the world. Especially a ring as slick as this one. Check out the genuine used JD white...

Buy Now

Cards Against Humanity - A Vicious Party Game

$25 from Amazon »

Cards Against Humanity is basically a more blatantly raunchy and politically incorrect version of the game Apples to Apples. And Apples to Apples is basically an evolution of Mad Libs that better lends itself to large...

Buy Now

Mixology Dice

$24 from Amazon »

Mixology Dice add a lemon twist to the traditional drinking game format. Rather than telling you when, these cocktail rollers tell you what to drink....

Buy Now

Titanium & Copper Bullion Paperweights

$10.99 - $48.49 from Amazon »

Here's some paperweight stocking stuffers for chem students and teachers, general science geeks, geeks in general, and people who just like to call it like it is. Metallum Gifts makes their periodic paperweights and desktop...