Historical clue formulations

• Vermeer painted a girl with a pearl one — 2022-07-22
• Stud, e.g. — 1999-06-16
• Place for a stone — 1996-04-19
• Hoop — 1994-11-25
• It may hang by the neck — 1994-06-25
• Loop for a lobe — 1994-02-09