- Duchess Katharine of Kent
- Unknown Owner; sold at auction at Sotheby's for $211,255 in November 2014
- What is this tiara's provenance prior to Duchess Katharine?
- Did Duchess Katharine actually own this tiara or was it loaned to her?
- Who currently owns this tiara?
- Sotheby's - Aquamarine, Natural Pearl, and Diamond Tiara
- Artemisia's Royal Jewels - Kent Aquamarine Tiara
- Royal Magazin - Kent Aquamarine Tiara