Big shiny things like black gobstoppers?
And as hard as bullets! Scarification is easier said (and spelt) than done.
Wow! Good luck with those - they could prove the highlight of your (already nifty) collection in times to come!
Maybe if I can provide something like this.................
Totally unrealistic, but the person involved is growing S.macrobotrys as a houseplant (
) so maybe there is some hope.
I'm delighted you've got such a fine "return" - you deserve it!
I try to share, but this was a very nice surprise.