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Shaping a crystal quartz point, wand, obelisk
  
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ed7232004




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PostPosted: Jan 29, 2019 22:39    Post subject: Shaping a crystal quartz point, wand, obelisk  

Hello all! Recently joined a local gem club where the shop has all kind of tool from cutting, grinding to polishing. Any tip or tricks on shaping a raw quartz or amethyst related material into a beautiful wand and points? Been searching on nets but am not able to find any tips on it. Hoping someone expert here can direct .


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ed7232004




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PostPosted: Jan 29, 2019 22:43    Post subject: Re: Shaping a crystal quartz point, wand, obelisk  

Here is another working process


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ed7232004




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PostPosted: Jan 29, 2019 22:44    Post subject: Re: Shaping a crystal quartz point, wand, obelisk  

Close to finish


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ed7232004




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PostPosted: Jan 29, 2019 22:45    Post subject: Re: Shaping a crystal quartz point, wand, obelisk  

As you can tell from the last picture, I can not get the "point" being even and pointy. Anyone has tips and tricks? Thank you in advance
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Gail




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PostPosted: Jan 29, 2019 22:55    Post subject: Re: Shaping a crystal quartz point, wand, obelisk  

I cannot see myself ever doing this to a crystal. Perhaps there are others who will direct you.
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Gail




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PostPosted: Jan 29, 2019 22:57    Post subject: Re: Shaping a crystal quartz point, wand, obelisk  

Gail wrote:
I cannot see myself ever doing this to a crystal. Perhaps there are others who will direct you.
.

Since you’re in Texas, as am I, you might join the Arlington gem and mineral club if near DFW. They teach cabochon and faceting classes.

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Pete Richards
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PostPosted: Jan 30, 2019 09:36    Post subject: Re: Shaping a crystal quartz point, wand, obelisk  

If it is to really look like a quartz crystal, you have to get all the angles between the facets right. The prism has to have six faces at 60° rotation to each other; you might as well make them the same width. The critical part is the termination. The faces should make an angle of 38° with the long axis of the crysatl, or with the adjacent faces of the prism. Three should be the same size and meet at a point. The other three should be smaller - or you can make all six the same size, but that's not typical for quartz, even an idealized crystal.

Even with this attention to detail, it won't look like a real amethyst crystal, but it will be geometrically accurate.

As it happens, I have been working all this out because I am about to try to get someone to make me a "quartz" crystal out of a hexagonal acrylic rod. Consequently, I can attach the diagram below.



Nadelquartz.jpeg
 Mineral: Plastic quartz
 Dimensions: 12 x 500 mm
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Plans for a scaled-up needle quartz with a ~40:1 aspect ratio. Come to the Rochester Mineral Symposium to find out why!
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ed7232004




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PostPosted: Jan 30, 2019 22:57    Post subject: Re: Shaping a crystal quartz point, wand, obelisk  

Nice! That's a very detailed diagram ! I suppose I'm gonna need measurement tools in order to get those angles right.
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Matt_Zukowski
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PostPosted: Jan 30, 2019 23:36    Post subject: Re: Shaping a crystal quartz point, wand, obelisk  

Pete, do you know about:
https://www.smorf.nl/3dprints.php
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Pete Richards
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PostPosted: Jan 31, 2019 11:32    Post subject: Re: Shaping a crystal quartz point, wand, obelisk  

Matt_Zukowski wrote:
Pete, do you know about:
https://www.smorf.nl/3dprints.php


I am familiar with "smorf.nl" but was not aware of the crystal models. Smorf is a java-based crystal drawing program that the author uses to provide all the crystal drawings for Mindat. He and I have had a number of conversations about our respective crystal drawing programs, Smorf and SHAPE.

It's really neat that the author has hooked Smorf up with a 3-D printer to make these crystal models. In principle, anyone could print their own crystals in 3-D.

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moosix




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PostPosted: Sep 28, 2019 18:21    Post subject: Re: Shaping a crystal quartz point, wand, obelisk  

As you can tell from the last picture, I can not get the "point" being even and pointy. Anyone has tips and tricks? Thank you in advance
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Matt_Zukowski
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PostPosted: Sep 28, 2019 23:25    Post subject: Re: Shaping a crystal quartz point, wand, obelisk  

Were you ed7232004? Did you move to NSW? The reason why you have not gotten much advice is that this is not really a lapidary site. We like natural, well-formed crystals as they come out of the ground. Do a google search for "lapidary" and "forum" and you might find places where people are discussing lapidary. Good luck.
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