donwrob
has rocks in the head
Member since June 2003
Posts: 509
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Post by donwrob on Oct 11, 2003 17:56:37 GMT -5
Hi all, I had to post this pic because I like it so much. The obsidian really came out nice this time, very happy with it. I preformed the shapes by sawing and then a tile cutter. The tear drops were grinded into shape before tumbling. Thanks for looking, talk to you all later, Don
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Post by docone31 on Oct 11, 2003 18:23:53 GMT -5
Absolutely wonderful job!!! I like the shapes, and the conformity. The tile saw must have been wet for sure. That is a great job cutting, and polishing. Now what? I can barely get that with my fancy diamond wheels, belts, and buffs. Way cool!!!!
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James
freely admits to licking rocks
Member since October 2003
Posts: 876
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Post by James on Oct 11, 2003 23:43:06 GMT -5
Man... That is nice! Is that "Gold Sheen" and "Rainbow" Obsidian? And waht kind of grinder did you use for shaping the stones?
Great work!!!
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donwrob
has rocks in the head
Member since June 2003
Posts: 509
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Post by donwrob on Oct 12, 2003 9:07:01 GMT -5
Thanks guys! doc, I actually have an old Frantom 18" rock saw. I picked it up about 3 years ago to slab large pieces of flint for knapping. It runs like a champ. I used a tile cutter to cut the sawed slabs into the triangular shapes. It was just one of those hand held manual jobs that have the little scoring wheel on them. James, the obsidian is suppossed to be silver sheen and peacock. The peacock does look like gold sheen in the pic. It is the same as rainbow, but I think they call it peacock when it has more green in it? I'm not quite sure though. For the tear drop grinding, I was experimenting with a beat-up cabbing set-up I bought this summer. It has a 6" diamond wheel that is pretty much shot. It has a flat spot on it that makes the pieces chatter. I broke about 1/3 of the pieces I tried to shape . I don't even know what grit the wheel is, but I have a new one on the wish list, 100 grit per docs advice. Thanks again guys, Don
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Post by docone31 on Oct 12, 2003 17:01:53 GMT -5
With that 100 wheel, take a piece of dunnage material, and lightly, with water drip, grind and grind. Start lightly and add some pressure. This will break in the wheel. It is like a new engine, take it easy but do it. 180 is just too fine for preforming. Use rubber wheel and belts for the rest of the sanding. Break them in the same way. Great obsidian.
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Sekhmet
off to a rocking start
Rocktumbling fool, It's rocktumbletastic.
Member since September 2003
Posts: 11
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Post by Sekhmet on Oct 18, 2003 2:10:44 GMT -5
Wonderful job with the obsidian! Doc, when you were in Oregon, did you ever go out to Newberry Crater by Bend? It is the most awesome place, a mountian of glass. The chips that you pick up off the ground have so many beautiful patterns when you hold them up in the light...the stuff is amazing (hard on even the best boots though)! Be Well, Sekhmet
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James
freely admits to licking rocks
Member since October 2003
Posts: 876
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Post by James on Oct 18, 2003 11:42:15 GMT -5
Hey don, what kind of poilish did you use for these rocks?
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Post by docone31 on Oct 18, 2003 17:29:28 GMT -5
No,I never got to Bend, at least not to collect rocks. I hope to go back there and do so within the next few years. I am selling my shop here, with training mind you, and my wife and I are going back to school for advanced training. A lot of times when I travelled, I found out about things after I left. I miss the west.
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Post by Noosh9057 on Nov 30, 2003 11:46:50 GMT -5
Absolutely wonderful job!!!!!! this is great!!!!!!!
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