lapidary1234
starting to spend too much on rocks
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"If you like rocks you can't be all bad!!" ~ old timer quote
Member since October 2021
Posts: 181
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Post by lapidary1234 on Jul 25, 2024 15:02:52 GMT -5
Not sure exactly where to post these. I chose the cabachon section because I used a cabbing machine to polish these. I used magnetic end plates on a steel master lap I got straight from diamond pacific ![](https://res.cloudinary.com/drpfqctty/image/upload/v1721937234/svnyaptbtmbrlyjfx4xc.jpg) ![](https://res.cloudinary.com/drpfqctty/image/upload/v1721937234/wrwm4qtrcls83obwje4j.jpg) This method has proven more difficult than I had initially imagined as larger surfaces have the tendency to develop flat spots and it is hard to keep a stone perfectly flat! The sequence I've settled in on is starting by flattening the stone with an 80 grit metal lap then refining with a 150 grit metal lap. From here I move to the 140 nova disc and then the normal sequence (280,600,1200,3,000). If the stone is a size I can manage on a wheel I will move to wheels after getting the initial flat surface. I've found that if a stone is flattened properly that the 280 wheel doesn't put much of a dome on it. Larger stones I have to progress on the end plate discs. The magnetic novas are nice in that they don't have the foam back which while foam works great for contouring cabochons if you press a flat piece against foam it will work the edges more leaving even more flat spots. It has been a learning experiment but I'm glad I invested in these as they allow me to work larger pieces! Thanks for looking! ![](https://res.cloudinary.com/drpfqctty/image/upload/v1721937742/ngnjvikssmu8hkcqnrip.jpg)
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pebblesky
fully equipped rock polisher
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Purchased another UV mini bowl for tumbling
Member since September 2022
Posts: 1,975
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Post by pebblesky on Jul 25, 2024 15:28:18 GMT -5
Love how they turned out. The Royal Imperial Jaspers are really amazing!
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Post by victor1941 on Jul 25, 2024 15:54:57 GMT -5
Thanks for the tutorial and excellent results.
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Post by liveoak on Jul 26, 2024 7:02:22 GMT -5
They look great !! Thanks for spelling out your process.
Patty
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Post by jasoninsd on Jul 27, 2024 22:18:57 GMT -5
Great results...and fantastic specimen pieces!! ![:)](//storage.proboards.com/forum/images/smiley/smiley.png)
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