Jay Litwyn wrote:

It is called a http://en.wikipedia.org/wiki/geode, and it is hard to beat. I saw one at Bedrock Supply in Edmonton.

I have a slice of one here; lovely when the sun shines through it. And there's a jewelry store nearby that has a large bubble shaped one (about 2 feet wide, 3 feet high) lined with small-to-medium-sized amethyst crystals. Geodes are cool. -- David gnome@hawaii.rr.com authenticity, honesty, community

Ever see a blown up image of a CPU? I link to a guy who is making fractals that look like those. Silicon is a solid pretty much like stone. Layers upon layers, and that's just the multiplier circuitry that works in five cycles. Then there are holograms, which are again solids. I am pretty sure someone is printing or could print fractals as holograms. Tony wants CARVED. How would you get a lot of colour with carving? I suppose if you do it in glass, then you can colour it after the carving, or you could use coloured glass powder and melt it, then carve it. Ever nuke a CD-ROM? Google "fun with microwaves". Those are fractals in Aluminum, made by us, from otherwise useless America Online disks 8-) Carved stone, though. outside=atan grayscales are up my alley. They are not what most people think of as fractals, though, if you take the word back to its apparent roots in fracture. The parts of them that I like the most are gradient shadings. http://ecn.ab.ca/~brewhaha/Fractal_Gallery.HTM Some of them might make nice coins. I designed four of them for card suits, many years ago. I was recently working up the nerve to view someone else's source and help work out the bugs in a visualizer for...well...coins: Random Dot Stereograms. That is because I am not sure that outside=atan grayscales always make spatial sense. In other words, do they break the same rules that Escher broke to make his two-dimensional drawings that do not render in three dimensions? Or do they make more sense when treated as embossed solids with one source of light? That would take another ball of wax in post-operative analysis: ray-tracing or something like that. All told, I do not think there is an easy way to beat a geode, partly because all those crystals are prisms, so if you move, then it sparkles. Diamonds and a lot of other crystals are certainly cut and carved, though, so it's entirely appropriate for a geode to be in a jewellery store. Bedrock Supply is an arts and craft supply store, which is much the same thing as a jewellery store, except with more stock in source goods, like powerless copper plating solution (I did not know that existed until I saw it). Carved Stone Fractals. Okay, so if you take my definition of fractal, which is simple rules with complex results, then the ten commandments are a fractal. Ten simple rules, and it's beyond power of the flesh to avoid breaking at least the tenth one, "Thou shalt not covet". So, you can describe all of society's ills in terms of ten commandments. You can write a book, like someone did, about each of the ten commandments: focus on what harm violations of one particular commandment can cause. And of course there is the classic work that tries to add them all up, then branches into degrees of tolerance in a new covenant that ultimately is not any different from the old covenant with bigger holes, no death penalty, and more space for misunderstanding, and it ends up in some kind of dreamy and vague prediction of an apocalypse that was supposed to happen in the first millenium. ----- Original Message ----- From: "Tony (Anthony) Hanmer" <a.hanmer@gmail.com> To: "Fractint and General Fractals Discussion" <fractint@mailman.xmission.com> Sent: Saturday, March 06, 2010 2:30 AM Subject: Re: [Fractint] Does the world's 1st 3d fractal carved in stonealreadyexist?

OK, these are natural fractals, and I agree, they're wonderful - in fact, as a result of the years of fractal reading and programming I've done, I can paraphrase the boy in the film "The Sixth Sense" & say, "I see fractals. Everywhere." But I want to know about *artificial* fractals in stone, ones made by US and carved by machines.

Tony

On 6 March 2010 07:27, david <gnome@hawaii.rr.com> wrote:

...

Jay Litwyn wrote:

...

It is called a http://en.wikipedia.org/wiki/geode, and it is hard to beat. I saw one at Bedrock Supply in Edmonton.

I have a slice of one here; lovely when the sun shines through it. And there's a jewelry store nearby that has a large bubble shaped one (about 2 feet wide, 3 feet high) lined with small-to-medium-sized amethyst crystals.

Geodes are cool.

-- David gnome@hawaii.rr.com authenticity, honesty, community

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"Maryetta Campbell" wrote:

Jay Litwyn wrote:

...

It is called a http://en.wikipedia.org/wiki/geode, and it is hard to beat. I saw one at Bedrock Supply in Edmonton.

Those crystals are nothing compared to what may be seen at the following:

http://news.nationalgeographic.com/news/2007/04/photogalleries/giant-crystal...

A question at the end asks: "Should we continue to pump water to keep the cave available so future generations may admire the crystals?" geologist Juan Manuel García-Ruiz said. "Or should we stop pumping and return the scenario to the natural origin, allowing the crystals to regrow?" Plant life in the Mohavee (Mojave?) Dessert is worth far more consideration. Greens are all that recycle coal, and anything we can do about dessert expansion is good, although it would not hurt to hav numbers like the ratio between coal used to pump water and carbon captured. I suspect that worse ratios are in Canadian farming when you add tractors and chemicals. Plus, especially down there near the equator, a lot of it ends up as atmospheric moisture, and for the last two or three years, Alberta's been in drought. _______ http://ecn.ab.ca/~brewhaha/ The above opinions are mine; all mine. Get your own.

"Maryetta Campbell" linked to: http://www.dezeen.com/2009/06/22/radiolaria-pavilion-by-shiro-studio/ Thanks. I was thinking of what I would want to do with a printer like that in news:/rec.music.theory (in a thread about music and physics), and that is make three-dimensional sine-waves with a surface of rotation: Turn music into a pipe; might make an awesome muffler. Hey, and my sixth version of http://ecn.ab.ca/~brewhaha/font/Saffron_Karaoke_Duet.wmv (quartet, currently) might pan out to hav _good_ five part harmony. I can listen to my current four-part version five over and over. Hopefully, other people can stand it by now, a year and a half after my first release. Harmonies are in it that I do not like. If recasting all five parts from a series of perfect fourths (4/3) will work, then those harmonies will go away next week. If not, then reordering the parts from where they start now will work in two weeks. If not, then tuning my starting chord by ear (over the space of one octave) will work in less than three. Failing that, I will leave the sound alone, improve the colouring, and hope my friends like the disk with six duets picked out of the quartet. My current strategy improved my melody.and my beat. Version seven will feature contrasting instruments instead of sine waves, so that it is easier for singers to pick out their part. I do not think there are many five or ten cylinder enjinz, so a muffler made out of these sine waves would need to glide in the surface of rotation, so that there only has to be one pipe. I think the volume in the first wave should equal the volume in a car's piston chamber (total displacement/cylinders). I would be effectively speeding the music up to minimize the number of oscillations, then scaling it to device resolution and length of pipe I want. Before I degrade it to muffler status, I *would* see what it does when I plug one end and blow over the other; might make an awesome dijeree duu (however you spell that). *This is literally a pipe dream*.