CG sister's have snarked on Snakey in the past so I doubt they would loan anything to her willingly.
I missed this!!! What did the say about the uber klassy Slitzerella?

IIRC, it had something to do with CG just giving out titles "just anyone these days" or something similar to that effect, prior to the wedding of CP and Sofia.
Also, I too hope that Princess Margaretha leaves Madeleine the aquamarine tiara upon her passing. It seems that aquamarines are possibly one of Madeleine's favorite gemstones since Lilian left her the huge aquamarine ring as well.
I don't know if Madeleine is attempting to not wear the same tiaras as Sofia or not. I'm just shocked that Sofia was allowed the amethysts so early on. I thought for sure she would have to stick with the button tiaras for a bit as they always seem like the introductory tiaras. At the end of the day, unless Madeleine only wants to wear the aquas (her birthday tiara and Margaretha's) or her modern fringe, she will eventually be seen in one Sofia has worn. I have no doubt that Sofia will wear all of the tiaras that Silvia allows her to wear.