Historical clue formulations

• Units divided into 100 points — 2023-11-10
• Pearl units — 2023-08-13
• 200-milligram units — 2019-07-13
• Ring figures — 2019-04-24
• Diamond figures — 2017-09-03
• Diamonds are weighed in them — 2017-06-20
• Cartier units — 2014-07-27
• Stone figures? — 2014-01-12
• Gem units — 2011-10-31
• Ring figures — 2010-10-31
• Gem measures — 2008-11-17
• Ring figures? — 2008-09-09
• Gem units — 2007-07-02
• Gemologist's concern — 1997-11-19