A photo I also just posted in another Life Crystal thread. It shows the crystals affixed to the palm under a latex prosthetic, which put the crystal at or below skin level. The prosthetic also hid the power wires. Sorry for the blur, but I was shooting my bluray on my TV screen with my phone. When I watch the film, it seems to me that the palm crystals glint like faceted crystals, not like the rounded-off copies of copies of copies we get off eBay. Also, another photo of a transparent 2" version I just printed at i.materialize.com. They offer clear and color-tinted transparent materials that aren't offered on Shapeways.com, and the transparent print was roughly the same price as a grainy opaque red one I had done at Shapeways last year.
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http://www.rogermwilcox.com/LogansRun.html
This is the page where the green crystal can be seen. Scroll down to number 16. This says that (as far as he knows) this is a copy of the crystal that would be worn by the "Extras" in the movie instead of the main characters. This is what my weathered version is based on. This is the best lineage I can find to a close up of a crystal.
I doubt that the crystals would have worn down in the Logan's Run universe but who knows?
(in the Logan's run world) I would think it would indeed be some kind of 3D printed acrylic with bio luminescence built in. The computer can't mine REAL crystal. So, the "crystal" would be installed at birth and slowly wear down by the time they have to die at age 30. (23?)
RE the crystal being concave, I'm not sure they are supposed to be.
Do you still have it? A picture would be awesome, if yes.
Jintosh, I've done a comparison of the palm crystal you did and a 3D lifeclock someone posted online years ago. Very similar, but I do see some changes to the palm version. I wonder how they were originally constructed?
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They were concave and not flat, time and aging had nothing to do with it.
I got my Production made set before the Movie even hit the Theater
More pointed and yes they had reflective backing on them
:facepalm Okay, I missed the post about them being originally concave and not the result of time. Concave mine will be then.
Pointed on the part that goes into your hand ? I might need a picture or diagram to get that.