A friend of my mother’s (and I know, as I type that, that really I
should have known) asked me to make some stones which she and her
late husband collected together into jewellery.
These are all carnelians and agates found by the se, and ready
polished. I’m by no means a lapidary but I have drilled stones
before and agreed without any qualms. But drilling these is proving
to be a ridiculously slow and painful process; I’m using solid
cylindrical bits at about 10,000 rpm. Is there anything else I could
be doing, or is agate really that hard?
sorry to be so dense.