Answer:
The oldest records, will link to old caves, or man made structions, cave drawings, or wall paintings of the past of human life
or the oldest object form the past will lead to the subject of the zircons from 4.375 billion years or so by people
these crystals are made of from nesosilicates and metal zirconium
Zircon is a popular gemstone that has been used for nearly 2000 years