ISO 22764:2020—Jewelry And Precious Metals
During the formation of Earth, molten iron sank to its center to make the core, which took with it the vast majority of the planet’s […]
jewelry
ASTM F2999-19: Adult Jewelry
The earliest known jewelry is dated 142,000-150,000 years ago. It is a necklace made from half-inch-long sea snail shells found in a cave in Bizmoune […]
ASTM F2923-20: Children’s Jewelry
Since ancient times, gifting children with jewelry has been a globally practiced custom, as it is believed these gifts guarded children against evil spirits, bad […]