Picture of Lynch's Dune Fremen Crysknife and Sheath

Idaho hesitated, then: "And, Sire, there's one other thing. One of the mercenaries we knocked over was trying to get this blade from our dead Fremen friend. The mercenary says there's a Harkonnen reward of a million Solaris for anyone who'll bring in a single crysknife."

Leto's chin came up in a movement of obvious surprise. "Why do they want one of those blades so badly?"

"The knife is ground from a sandworm's tooth; it's the mark of the Fremen, Sire. With it, a blue-eyed man could penetrate any sietch in the land. They'd question me unless I were known. I don't look Fremen. But . . . "
-Chapter VI, Dune by Frank Herbert

Thanks for checking out my first Instructable on the Fremen Crysknife and Sheath. It's based on a prop from the 1984 David Lynch movie, Dune.

I'm going to state the obvious: I'm a huge Dune fan. I attribute that to the fact that I’d first seen the movie when I was four and four year olds are all wont to deem epic the things they see at that age. When I read the book many years later, it was like ingesting spice--I loved the book and the universe Frank Herbert built.

Then, there’s the crysknife from the Lynch movie. To me, it’s the best version of the Fremen weapon made from the giant tooth of the desert sandworm. It’s has a very raw, spartan look that best represents the hardy, survivalist nature of the Fremen, while details like the handle blisters and uneven ridges along the edge make it look organic, like it really was made out of the fang of an enormous creature.

I wanted my own crysknife, and found that there were already existing resin casts for sale. I bought one from Reel Art, which was a recast of what's known as the Greyzon version of the knife. Though it wasn't exactly screen accurate (it was patterned after an early production sketch of the knife that wasn't used in the movie itself) I thought it was a fine version of the prop. At the same time, I noticed that the moulding itself wasn't polished and could use a huge improvement in terms of quality. It also appeared to have been made of a recast of a recast of a recast.

Still, I was content with the knife and that would have the end of it...

...till somehow my dog took it for a bone and ate it.

After that I thought of ordering another one as a replacement, but what I wanted to look for the second time around was a real, screen-accurate prop replica. There was one that claimed by the eBay seller to be an original prop which he said to have "found in the sands of Mexico". It was probably a third-generation recast of an actual prop but still it was the closest I could get to an actual replica. I didn't win the auctions though, so that was that.

Left with no options, that was when I decided to try and make my own screen-accurate replica of the crysknife, and why not a sheath as well? After all, one must keep the crysknife sheathed at all times. Ultimately, I created this project for the really hard-core Dune fans, like myself!

This Instructable puts together efforts I had in creating the crysknife. Most of the process is documented in the Ginton Forge website, and a limited number of pieces are actually available for order at the moment.

I'm only ever doing 30 of these* so if you're interested, kindly shoot me an email at contact@gintonforge.com or send me a message via my contact form.  

I hope you guys enjoy this post. Bi la kaifa!

*30 for a countdown to the 30th Anniversary of Dune's theatrical release on December 14, 1984! And I have to keep a limit on these handmade builds so I can start on other projects as well.  

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novalord7423 months ago

If you are still working on the shimmer or glowing effects you might want to look into casting with fiber optic fibers in the resin for the mild shimmer and/or using quartz for its piezoelectric/triboluminescent effects.

gintonforge (author)  novalord74214 days ago

hi! thanks for the suggestion! my efforts with an LED IC has so far been unsuccessful--I'll look into your input :)

Excellent job on the movie prop reproduction. As for making a book version, thats sounds really tough. I don't remember a lot of detailed descriptions. But here is a picture of an actual knife made of Elk Bone. That reminded be a bit of a crysknife. It is curved but still (sort of) double edged. The marking or blisters shown on those prop knives are taken from the natural markings on real animal jaw bones, not actual teeth (see the gator jawbone pic below). The only animals on earth with a tooth long enough to make a knife from would be the Elephants, or Walrus tusk. The Walrus tusk being the closes. So design wise for making one from the book, it really depends on how you see the Worms teeth to start off with. With real bone you only shape the outer edge because if ground down to far you get into the soft inner layer. I realize this doesn't apply to casting something of course, but i thought I'd throw some info your way for realism sake... yes I'm using realism to describe a sci-fi knife from a giant worm.

gintonforge (author)  kbrownridge11 year ago

apologies for the late reply! i was away on a (much-needed) vacation. Having read your comment though got me on the lookout for bone/horn pieces on the weekend while I was travelling and I happened upon this water buffalo horn that was up for sale. this one was the best of the lot since the rest of the pieces were hollowed out; containing only the outer shell of the horn. this one's pretty solid.

i have no idea what i'm making out of it (the shape won't fit a regular crysknife) but i'll keep you posted!

gintonforge (author)  gintonforge1 year ago

btw, don't worry, water buffalo horn isn't illegal for trade, at least where i come from!

Few places restrict water buffalo horn. Now if you had said you pick up some rhino horn that would be very different. I wonder if Tagua nuts come large enough to make a crysknife? Tagua nuts are also call Ivory nuts, once tried they carve and look like elephant ivory.

I've never seen tagua larger than 4" (10cm) in diameter, and that size is rare. Maybe if you did the blade and handle as separate pieces, and joined them?
gintonforge (author)  kbrownridge11 year ago

So design wise for making one from the book, it really depends on how you see the Worms teeth to start off with. With real bone you only shape the outer edge because if ground down to far you get into the soft inner layer. --> i gave this some thought and thought about the Lynch version of the knife and the sheath, which appeared in the extended edition held by the Shadout Mapes in the photo. the knife with sheath seems to be the whole tooth since the blisters extend up to the sheath itself, which mean the knife and the sheath is made from a single tooth. i think it's a great conceptualization of the crysknife by the prop designer. amazing amazing prop!

gintonforge (author) 1 year ago

been working really hard on crysknife orders so I haven't been able to post another How-To! these I keep the nifty Makerlympics medal nearby while I work--it gives me an extra boost for when I get tired :)

i discovered a better way of painting the crysknife that maximises the look and feel of the resin; will post an Instructable on that when I get the chance! thanks for the support


Great Job gintonforge...! However, I am still very curious about the wood you used to make the original knife from...??? When I looked/ goggled up the terms you used

bitukling, locally known as ‘century wood’.

I cannot find any reference to them on the internet...! Except for the term century wood which is a reference to wood reused from old mill flooring... but the term bitukling does not exist on the internet... except from a wood from the Philippines...

So from what area of the USA or what part of the world do you come from???

The only native hard woods in the USA that would be considered soft and relatively available to most areas of the USA are Bass wood and Cotton wood.... A common southern soft hard wood, would be Cypress tree wood which was used for flooring for a lot of southern mills....

Needless to say many pine/ evergreen trees are found every where in the USA are soft as well.... but they may not hold the came kind of detailed carving as bass, cotton or cypress wood....

Thanks for sharing such a great post...!!!


gintonforge (author)  Ray from RI1 year ago

Excellent Google-fu Ray! I am indeed born and raised in Manila, and bitukling is one of the native species of trees here in my country. It's called century wood colloquially and used to carve images of saints for Catholic churches (we've got a lot of those leftover from 300 years as a Spanish colony), but I'll research the scientific name (I sense a tree junkie here!).

Another clue is that I've named my workshop after Ginton, who is a god of metallurgy of a tribe who lives way south in the Philippine islands. Many thanks for your comment!

Very cool...!!! Thanks for the additional information...!!!

gintonforge (author)  Ray from RI1 year ago

found it. bitukling/batikuling's scientific name is Litsea leytensis. it is endemic to the Philippines :)


Your cat looks just like mine. Awesome work on the knife. If I had any artistic or wood-carving skills I would make myself one. Sadly I lack the much needed skills, So I'll just admire yours!

gintonforge (author)  Spencer Jackson1 year ago

Am really enjoying the comments related to my cat. He's a pure white coated (he's a bit dirty in the photo) tom with Fremen blue eyes. I love him to bits but he hates the smell and sounds of the workshop when I'm working.


Here is mine, his name is Apollo. Named after the mission to the moon, as his fur reminded me of it.

Where might I find Century Wood? A search online did not yeild many results.

gintonforge (author)  Spencer Jackson1 year ago

found it. bitukling/batikuling's scientific name is Litsea leytensis. it is endemic to the Philippines :)

gintonforge (author)  Spencer Jackson1 year ago

man, your cat knows how to keep himself clean! Vanilla Ice (am sure you know where I referenced THAT from) doesn't seem to know how to.

"Century Wood" might be a misnomer because that's how it's known locally here in the Philippines--I don't know its international common name. The supply here can't be that high since the government listed "bitukling" in the list of tree species included in the nationwide log ban in 2012. I'll research the scientific name and post it here :)

Awesome, thank you.

legless1 year ago

Definitely do not buy stuff from recasters. They bring the hobby into disrepute.

gintonforge (author)  legless1 year ago

amen sir. the kitmakers I've met so far share the same sentiment :)

bennelson1 year ago

Congrats on the Makerlympics contest. Great project!

gintonforge (author)  bennelson1 year ago

Thanks man!

matson231 year ago
beautiful work, a truly unique and fabulous build, and congratulations on the contest win!
gintonforge (author)  matson231 year ago

Many, many thanks!

gintonforge (author) 1 year ago

Please bear with my Oscar-esque speech after winning in the Makerlympics which I also posted in my build blog:

From the bottom of my heart, thank you, Instructables!

I definitely couldn’t have won this without the support of friends and family, with particular mention of Jedi Master Gregg Yan, who did the first paint job on the knife (it made for brilliant photographs!). He deserves this award as much as I do and I consider him one of my mentors as a craftsman (though he will be too humble to admit it). I also thank Mark Bennett of Dune Info for giving me his valuable insight and guidance as (imho) the world’s best Dune chronicler and aficionado (I’d say expert but he’s too humble for that, too!) since I started out with the project many many months ago.

I’ll be doing something nice for the people in Instructables to show my profuse appreciation for their kind support of an obscure noob like me. I’ve decided to raffle the first light-up version of the crysknife here in the Instructables when I’ve finished crafting it, which I’m aptly naming “Muad’Dib’s Maker Lamp”. I'm still formulating the mechanics and of course, finishing the build. Please stay tuned for details!

Thrilled, grateful and humbled by the all the blessings and generosity of this world,

Mark Ponce

sjsquirrel1 year ago

Fantastic build of wonderful subject. Like Jmwells I read the books back in the seventies and fell in love with them. Unfortunately the gintonforge website is not responding at the moment so I can't go check out what you have for sale, or see your documentation of the process there. Depending on price I'd be keen to buy one. Send me a PM if you still have some.

One comment on the instructable - great work overall, but for a novice caster like me there should be more detail in the step on making the rubber mold. Personally I like to see instructables be self contained, rather than referring to more complete instructions on another site, which may or may not be available in the future.

Love the knife, and thanks for the memories!

gintonforge (author)  sjsquirrel1 year ago

thank you for your feedback! i'll have to dig into my files and see if I have any better documentation on the rubber mould step--it's just hard to take pictures when you have a lot of rubber in your hands :) maybe I should get a GoPro for that! but yes, I'll try to improve on the Instructable as I go along.

in the meantime, this guy made a pretty detailed video of casting resin: http://www.instructables.com/id/How-to-make-a-Gree...

the glowing Green Lantern ring is one of my favourite Instructables and it pointed me in the right direction in undertaking a casting project :)

As a professional thirty year veteran prop maker here in Hollywood, California and after working on many, many feature films, television shows, music videos, T.V commercials as well as theme park related design and toy design, I have to say that your piece is excellent and very well done. Good job. I went to the press premier of Dune at Universal Studios in 1984 with a friend who was a film critic for a Boston news paper. I was lucky enough to meet Raffaella De Laurentiis at that premier. And what a movie too. I place it up there with Bladerunner. Epic is all I can say. I hope you sell a lot of those knives...it's beautiful.

gintonforge (author)  Blaise_Gauba1 year ago

It's overwhelming to receive a comment from a real professional, many many thanks. I can't say I'm a pro, as I didn't know anything about resin or propmaking a year ago. I guess making the Lynch version of the knife turned out to be one of those obsessive projects that became such a pleasure to work at. I'm just happy it turned out well and people appreciate it. I watched some of the behind the scenes footage on Youtube, like the one filmed by Sean Young and I could only imagine how amazing it must be to meet those people and the work they did.

Thanks for the comment Blaise, it really means a lot.

The quality of your craftsmanship states the quality of the desire you show in the work you do to create something of beauty. If you only got into this sort of work within the last year or so, then all the more so...you should find it relatively easy to either find work [in] the industry, or a similar type of industry, or to continue working for yourself and build your craft from there. I work for myself basically...after doing so on and off over the last thirty years. One of my very first jobs was on Michael Jackson's "Thriller" music video...I never received screen credit, but it got me more work...I guess that's all that matters. Keep up the great work. You're doing just fine. Below are only a small (very small) collection of images from projects in my portfolio...the bottom image of the yellow foam Hand Scanner was for the Tim Burton's "Planet of the Apes". The VW Bug was for a Limited Edition of Herbie The Love Bug for Walt Disney Art Classics for a special release. I have done several porcelain based sculpts for WDAC. Your work is as good as mine. Well done!

gintonforge (author)  Blaise_Gauba1 year ago

Amazing work, Blaise! I do recognize the hand scanner Mark Wahlberg uses in Planet of the Apes, and my sister would absolutely LOVE the Cave of Wonders tiger from Aladdin.

Thank you for the kind words of encouragement--I only got into making this replica as a hobby, but if I get tired of my office job (I currently work in SEO and writing for the web) I'll definitely see propmaking as another option. I will have to practice if I want to get close to your level though! Thanks again :)

Well if it's a hobby...keep it up. You can definitely at least make extra money on the side doing work like that. You can see more of my work via my Facebook Artist Page below. One day maybe I will get to the Philippines for a visit. I have a friend who although lives in L.A. most of the time, he directs movies and television shows in the Philippines and in Malaysia. His name is Terry Izumi...look for his name in credits and on LinkedIn. He has a long resume and he is amazingly talented in pretty much any and all fields he has delved into.


gintonforge (author)  Blaise_Gauba1 year ago

Checked out your FB page and your work is inspiring Blaise! I'll definitely follow your work :)

Thank you Gintonforge. That's very kind of you. Seriously, keep up the great work. You are very talented.


PhotoBugg1 year ago

Thought about using an animal bone to carve one out of???

About 15 years ago, I saw a simple knife made from the leg bone of a deer. It looked great, was sharp, and very light!

nfrith1 year ago

Huge Dune fan myself. This is really an excellent piece of work. I admire your craftsmanship and I wish I had the patience to undertake something like this. Well done!

gintonforge (author)  nfrith1 year ago

You should give it a shot (that's why I made this Instructable)! It took me a long, time as well and I've almost given up many times along the way. One time I had 3 failed silicon moulds and was pretty depressed. But you're right, all it takes is a lot of patience. I'd love to see other crysknives created--after all, no 2 crysknives are alike because the Fremen personalised/custom-made their own knives. :)

spylock1 year ago

Nice work.

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