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Author Topic: Zig-zag pattern in agate - how to cut them?  (Read 327 times)

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R.U. Sirius

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Zig-zag pattern in agate - how to cut them?
« on: July 02, 2020, 01:00:22 PM »

This fist-sized (crazy-lace?) agate rough displays an interesting zig-zag pattern all around the perimeter. The obvious approach would be to then slab parallel to one of the exposed faces, hoping to capture similar patterns.

I am curious if anyone here could help me guess on what would happen if I cut across and through the pattern - would I end up with orbs? Or are these bands more accordion-like?
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lithicbeads

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Re: Zig-zag pattern in agate - how to cut them?
« Reply #1 on: July 02, 2020, 05:26:54 PM »

No orbs unfortunately just the small line like top of spikes. Blue malawi agate which has lots of smoothly undulating white lines will cut diffuse looking orbs when cut perpendicular to the lines. Orbs in agate have  been sought for millennia , they were favored in the very prolific Indus civilization and the Tibetans valued those orbed Indus beads greatly.
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R.U. Sirius

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Re: Zig-zag pattern in agate - how to cut them?
« Reply #2 on: July 02, 2020, 06:31:03 PM »

Orbs in agate have  been sought for millennia , they were favored in the very prolific Indus civilization and the Tibetans valued those orbed Indus beads greatly.

Would an example be the small orbs we could get by cutting a tube agate perpendicular to the tubes?
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irockhound

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Re: Zig-zag pattern in agate - how to cut them?
« Reply #3 on: July 02, 2020, 07:39:18 PM »

If you cut horizontally through the tops of the Dog tooth Psuedomorphs in the crazy lace you will get patterns like in the first picture here.  Of course how good the patterns will be depends on the banding colors and it there is good contrast or if you have a lot of clear it may not look that great.  The 2nd pic is of some nice crazy lace that formed Botryoidal nodes which when you cut Horizontally you would get the nice spherule shapes however even in this material the "bots" may only be towards the outer surface so as you cut deeper you may not get the same spherule pattern, It might only supply 1 or 2 slabs of the outter rind in that pattern, you just never know
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