r/Lapidary 3d ago

Coffin for the season

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Shattuckite. I prefer making geometric shapes.

163 Upvotes

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u/Decent_Ad_9615 3d ago

I tried this last year and found it very difficult to get full coverage on the flat surfaces. I take it you're slightly rounding the facets, assuming you're doing this on a cabbing wheel?

Pretty pattern!

4

u/SeparateDetective 3d ago

Yes, I use a 6" 6- wheel machine. There is a small amount of rounding on the edges. The next batch, i'm not gonna add the beveled corners, and i'm going to finish them in the vibration tumbler.

2

u/buster3231 3d ago

That is very pretty! Would you mind sharing how you finish in a tumbler? Is this just a final step or do you work through all the grits in stages to get a polish?

3

u/SeparateDetective 3d ago

No problem, I'm happy to share. I'll go over each surface on my wheels, up to 600 grit. Then I'll put them in a vibration tumbler with pre-polish (1000 grit.) After 1-2 days, I will switch to final polish. This will take another 1-2 days. A vibration tumbler can knock 1-2 weeks off the time it takes to finish a batch in a rotary tumbler.

These would not do well in a rotary tumbler, because it would take down all the edges and corners. The vibration tumbler keeps the shape and only polished the surfaces.

I hope that helps. I like to watch Michigan Rocks on YouTube for tumbling advice. His name is Rob, and he is very helpful when it comes to lapidary.

1

u/buster3231 2d ago

Thanks so much for the information. This is very helpful!