That jewelry belongs to Princess Caroline now, it's occasionally worn by Steph or Caroline (I think Charlotte may wear some as well on the occasion, and maybe Pauline). Charlene may borrow a piece every so often (like she did for the wedding. The "tiara" at the wedding reception gala? That was once Princess Charlotte's, that belongs to Princess Caroline), but won't wear them on a regular basis. For 1, she has her own jewelry that Albie bought her. 2nd, most of Grace's major jewlery pieces are part of exhibits these days, like the one coming up in Toronto.