Earring
Ear piercing is one of the oldest known forms of body modification, with artistic and written references from cultures around the world dating back to early history. Gold, silver and bronze hoop earrings were prevalent in the Minoan Civilization (2000–1600 BCE) and examples can be seen on frescoes on the Aegean island of Santorini, Greece. During the late Minoan and early Mycenaean periods of Bronze Age Greece hoop earrings with conical pendants were fashionable. Early evidence of earrings worn by men can be seen in archeological evidence from Persepolis in ancient Persia. The carved images of soldiers of the Persian Empire, displayed on some of the surviving walls of the palace, show them wearing an earring.
Zirconian
The first 196 million years after the formation of Earth, left no solid trace, except for the formation of the Moon. This time is termed the Chaotian Era. The first datable solid Earth minerals, zircons, mark the start of the Zirconian Era. The oldest known crystal could be dated to 4,404 ± 8 Mya. It was in metasedimentary rock on Erawandoo Hills in the Jack Hills of Narryer Gneiss Terrane in Western Australia. The 4.4 Gya is the limiting age, and zircons this old are very rare. But from 4.2 to 4.1 Gya they are already common. The bulk of the zircons in Narryer Gneiss Terrane date much later, from 3.75 to 3.5 Gya.