I have banded agate, mostly gray and white and could supply you withrough or slabs.
I tried cutting some of the material I thought would work for cameosand there is not enough contrast between the bands. I will keep myeyes open on my prospecting trips.
I have also not found agate first cut properly in slab so I cancarve into layers and two that has enough contrast. The layers arevery thin at times...will keep searching too.
TeriSilver & Cameo Heritage Jewelrywww.corneliusspick.com