I gave up. I bought sterling silver wire, and decided to make a few items for those who whine that copper jewellery is not “true jewellery”.
Sterling silver is not bad to work with, the wire I’ve got is softer than the silver plated copper I’m used to, so it’s easier not to make mistakes. Unfortunately it’s also about ten times more expensive.
This agate slab just rocks! It reminds me of frost, or a winter forest. Lovely! I decided it deserves to be wrapped in sterling silver (especially that other wire colours didn’t look that nice on it, it had to be cold and frosty). I added some white howlite beads for decoration as well.