I made marmalade this week ... and in case you are wondering ... yes those are not the right jars!
Sadly I found my proper jars lids have gone rusty so I need to buy more.
these have gone straight to the fridge
I used clementine peels, they were a lovely dark orange colour, and oranges
I also used brown sugar, I couldn't get the mixture to reach 222F so its a bit runnier than usual
but its very VERY good!