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Post by miket on Mar 25, 2019 14:37:44 GMT -5
Just another dremel piece. A lot of different material in it and I'm having a difficult time getting it even. It's got some quartz and some softer material- I don't know if it's the colors, the pattern or the challenge that keeps me at it. Not even sure the entire stone will take a polish but I'm going to keep at it.  The slab and what I've done to it   |
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Post by Deleted on Mar 25, 2019 15:11:49 GMT -5
Looks like it is going to be worth it. Mix of agate and common opal?
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Post by miket on Mar 25, 2019 15:49:50 GMT -5
Looks like it is going to be worth it. Mix of agate and common opal? I hope so! I wish I could tell you what it is, I really don't know enough. I thought the harder white stone was quartz but now you have me thinking. The creme/tan colored part is the softer part, that's what's driving me nuts. I have pretty fair control with the dremel but that part disappears way faster. |
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Post by Deleted on Mar 25, 2019 16:06:38 GMT -5
Not sure what is in your piece, but in some of the jaspers (Biggs, Deschutes, Wascoite) that have mixes of opal and jasper (and sometimes agate) the white common opal is harder, while the tan opalite (especially near the rind) can undercut. In others, such as Rainforest jasp-agate, the tan and greenish can be rhyolite, which also undercuts. Light touch and patience.
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Post by miket on Mar 25, 2019 16:30:38 GMT -5
Not sure what is in your piece, but in some of the jaspers (Biggs, Deschutes, Wascoite) that have mixes of opal and jasper (and sometimes agate) the white common opal is harder, while the tan opalite (especially near the rind) can undercut. In others, such as Rainforest jasp-agate, the tan and greenish can be rhyolite, which also undercuts. Light touch and patience. Ok, thanks. Undercutting is definitely an issue. Light touch and patience are two skills I'm trying to hone. The funny thing is that I used to consider myself a patient man. Until I started this hobby I had no idea what patience was, apparently. |
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Post by rockjunquie on Mar 25, 2019 17:12:53 GMT -5
Looks like a keeper to me! Good luck!
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Post by miket on Mar 25, 2019 19:46:05 GMT -5
Looks like a keeper to me! Good luck! Thank you, as long as it holds together I should get there... |
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Post by hummingbirdstones on Mar 25, 2019 20:03:27 GMT -5
Nice stone! What are you using in your dremel to cab it?
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Post by miket on Mar 26, 2019 9:25:24 GMT -5
Thanks! I've been using diamond wheel burrs, here's a pic  |
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Post by hummingbirdstones on Mar 26, 2019 10:05:27 GMT -5
When you have a stone that undercuts, you'll need to use something that is less aggressive than the diamond burs to avoid some of it. Consider getting wet/dry sandpaper in different grits to use with split mandrels or Nova points and just do the very rough shaping with the diamond burs. It won't completely get rid of the undercutting, but it should help.
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Post by miket on Mar 26, 2019 10:20:03 GMT -5
Ok, thanks. I have some other bits that I can try- no split mandrels but I'm sure I have some of the others somewhere.
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