Historical clue formulations

• Ring highlight? — 2022-10-01
• Very fine example — 2020-12-05
• Beaut — 2020-04-17
• Turquoise or aquamarine — 2018-08-25
• Beauty — 2014-05-02
• Crown inset — 2014-02-05
• Singer with the 1995 12x platinum album "Pieces of You" — 2011-12-13
• Tiara inset — 2011-05-31
• Gem — 2010-05-11
• The Pink Panther, e.g. — 2010-03-27
• Particularly prized possession — 2009-08-29
• Diamond or sapphire — 2009-06-08
• Crown sparkler — 2004-01-05
• Precious stone — 2003-09-17
• Gem — 2000-06-19
• Solitaire — 1999-05-26
• Watch bearing — 1997-03-14