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Obsidian, what do you see?

johnw
In Memoriam

RIP John Waring, you are missed

Member since January 2018
Posts: 793

Obsidian, what do you see? Oct 9, 2018 11:02:13 GMT -5

Quote

Post by johnw on Oct 9, 2018 11:02:13 GMT -5

Sept 28, 2018 22:05:22 GMT -5 woodman said:

got this chunk off the polisher today, never get tired of looking at obsidian!

woodmman, how big is the piece and how did you finish it? Would love to get the details. Cheers, johnw

woodman
driving up their electric bill

If you cannot explain something in simple terms, you do not know enough about it.

Member since December 2014
Posts: 2,710

Obsidian, what do you see? Oct 9, 2018 20:58:07 GMT -5 MsAli likes this

Quote

Post by woodman on Oct 9, 2018 20:58:07 GMT -5

Oct 9, 2018 11:02:13 GMT -5 johnw said:

Sept 28, 2018 22:05:22 GMT -5 woodman said:

got this chunk off the polisher today, never get tired of looking at obsidian!

woodmman, how big is the piece and how did you finish it? Would love to get the details. Cheers, johnw

I don't see that particular slab handy right now but I think it is about 4 by 6" more or less.
after cutting i degrease them in a toaster oven to get all of the oil off. probably could do it different but that is what works for me. After all the oil is off i go directly to my Bull Wheel with 100 grit belt on it, once I get all the saw marks off I go to 220 grit , then to 400s grit. In Between each step I hit it with a pressure washer. Once sanded it goes to my 36" polisher with cerium oxide on a 100% wool carpet pad.
It took a bit to learn how to polish obsidian but found the secret, at least for me, is the sanding, the better the job of sanding the better the polish.

I just took 13 photos of another slab and It illustrated another very good point, beefore trying to take photos of it, make sure all smears and fingerprints are off. I failed 13 times so will not post my failures at picture taking here.

Last Edit: Oct 9, 2018 21:00:19 GMT -5 by woodman

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Welcome to the Rock Tumbling Hobby Forum where we share a love of rocks and a sense of community as enduring as the stones we polish. The RTH Forum of www.RockTumbling.com is an Amazon Associate site and we earn money from qualifying purchases you make after clicking on our links such as this Rock Tumbling Supplies on Amazon link for instance, or any of our various product ads and banners. By clicking our links every time you begin your Amazon shopping experience, you are generating a bit of revenue for the forum which helps us cover our expenses. Thank you for your support!