It was pointed out that this is the twentieth anniversary of L&Cs wedding. So how about so stories set there.

20th Traditional Anniversary Gift: CHINA
Modern Gift: PLATINUM
Gemstone: EMERALD
Flower: DAY LILY

ON the gemstone.... uh oh, it kryptonite could be mistaken for an emerald, couldn't it?

You read my mind! I was thinking that this needed a fanfic challenge!

Oh, that sounds like a great story idea!

Ruby is 40th anniversary but maybe get that instead of emerald because green stones have such bad memories for both of them. Green kryptonite has such obvious effects that it is hard to imagine them not figuring it out right away. Red has a range of effects so they may not realize what is happening for a while.