Hi everyone, my deepest apologies if this is the wrong place to post this but I am a newbie to the forum. I'm an Oregon Sunstone dealer and most of my clients are gem cutters so I thought this to be the best place to offer my services to anyone who is interested. I have the very best color and cutting quality stone.
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Thank you Barbra, again, my apologies! The Sunstones are sourced from a private mine in Plush, OR. The pieces I have and get are from 35-150 carats. By the way, I have a question for anyone who could help me. Recently I fell in love with this heart-shaped rough, its an incredible neon red and aqua blue, and I am dying to get both colors in there separately. But anyone who's worked with Oregon Sunstone knows you can very easily blend and create a rootbeer Burgundy ugh..... Does anyone have any suggestions on cuts or types of cuts that will possibly work to get good color separation? Thank you!
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Joined: Wed Sep 02, 2015 10:52 pm Posts: 1131 Location: Central Queensland, Australia
Hi Sunstone - I really like that material you've got there
I've never faceted any Oregon sunstone (I've not seen it offered for sale here in Australia) but I've faceted some bi-coloured materials in different designs with interesting results.
I faceted some man-made stuff (cristinite) a while back, it was half blue, half orange. It was a barion type design - a round brilliant type pavilion attached to a different shaped crown. The result was that the two colours mixed. It was actually intruiging in this stuff, giving a swirling effect was mostly green but that changed colour as it was moved, showing flashes of the original blue and orange.
But I wanted to show the two colours as they were in a stone without mixing. I cut the next piece in a long step cut, with both crown and pavilion step cut. The result was what I wanted - a perfect orange and blue half and half that did not mix.
I then cut another piece with the same step cut crown but with a brilliant type pavilion - and once again the colours swirled and mixed.
It occurred to me that I've never seen ametrine cut any way other than a full step cut and I suspect that a round or round-ish pavilion will cause light to swirl and colours to blend. Full step cuts seem to be the way to go if you want to show more than one colour without them mixing.
Hi there Sunstone, your roughs look quite nice. The piece you are asking about looks as though it might be best off fantasy cut or carved? It's a very irregular shape and I don't see getting much yield out of it as a flat-faceted gem unless maybe it was split into a couple pieces. You're definitely right to be avoiding mixing the two colors as burgundy mud is not nearly so eye-catching as a gem that has blue and red zones.
Thank you so much for your help everyone! I guess the answer to the fantasy cut/carved point is that I'm going to try to do both carving and faceting to try to get the colors to split. Basically I'm going to do external Faceting for all the green/blue and concave Faceting for the red and see how it goes.. I also had someone else tell me that only the step cuts they had cut separated colors well. So my question there is: How intricate could the step Cut be? Because isn't an Asscher a step cut? And that seems to have a lot of facets... I guess the pattern I'm seeing in what you're all saying and what others have said is that any kind of brilliant Faceting seems to refract the color back into itself somehow. But that Faceting a step cut somehow allows the light (and therefor the color we see) not to run into itself as much on the way out of the stone.. Anyway, thank you again!
Joined: Thu Jun 19, 2014 7:26 am Posts: 159 Location: MB, Canada
I had some success on a big sunstone a while back. It was blue-green in one direction and red in another. I used a keeled design like Lefty is suggesting.
You'll get more suggestions in the Lapidary Corner forum as most faceters hang out there. Lefty, you have the same thing in your sunstone in Australia, except that in Oregon, there are copper impurities and inclusions that create wonderful color and/or schiller.
Joined: Wed Sep 02, 2015 10:52 pm Posts: 1131 Location: Central Queensland, Australia
LaBoom wrote:
You'll get more suggestions in the Lapidary Corner forum as most faceters hang out there. Lefty, you have the same thing in your sunstone in Australia, except that in Oregon, there are copper impurities and inclusions that create wonderful color and/or schiller.
I just need to find a deposit of it where the volcanic pipe punched through a copper deposit on the way to the surface
I found a couple of tiny pieces that were vivid orange but too small to bother faceting.
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