assuming any of them know. Cadsuane doesn't often Channel around any of them, IIRC the only time she's done anything is when she was questioning Semirhage (and later showing Sorilea and Bair the male a'dam). Clearly things she didn't need the angreal to accomplish. Even most AS don't seem to know more than a few rumors about Cadsuane's ornaments... she's very circumspect about them and is very disciplined.

Winter's Heart
The Hummingbirds Secret

"Even what we think is perfect can have flaws, Aleis." Cadsuane drew on her own Well, taking in saidar in a measured amount. She had practice; the little golden hummingbird could not hold near so much as Nynaeve's belt. "Flaws can pass unnoticed for centuries before they are found." The flow of Air she wove was just enough to lift the gem-encrusted coronet from Aleis' head and set it on the carpet in front of the woman's feet. "Once they are found, however, it seems that anyone who looks can find them."
Thirteen sets of shocked eyes stared at the coronet. One and all, the Counsels seemed frozen, barely breathing.
"Not so much a flaw as a barn door, seems to me," Darner announced. "I think it's prettier on your head."
The glow of the Power suddenly shone around Nynaeve, and the coronet flew toward Aleis, slowing at the last instant so that it settled above her bloodless face rather than cracking her head. The light of saidar did not vanish from the girl, though. Well, let her drain her Well.

Note how careful Cadsuane is when using her Well. She accomplished her task with exactly what she needed to do and moved on, and even noted Nynaeve's lack of control.