Historical clue formulations

• Approximately three-quarters of all known chemical elements — 2024-08-19
• Elements with names ending in -ium, typically — 2018-01-24
• "Precious" or "heavy" things — 2013-04-16
• Most are good conductors — 2007-12-26
• Assayer's area of expertise — 2006-10-06
• Mint supplies — 2002-12-12
• Some are precious — 1999-02-07
• Lithium and others — 1996-07-14
• Silver and gold — 1995-05-05
• Mercury and others — 1995-04-08
• Forge materials — 1994-05-19