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…
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…
What Makes a Precious Metal?
The now-omnipresent and affordable aluminum was once more expensive than gold. Treating it as precious and exotic, Emperor Napoleon III had aluminum cutlery made for state…
New Titanium-Gold Alloy Could Improve Medical Implants
In mid-July 2016, a team at Rice University, led by Professor Emilia Morosan, created a super-hard metal made from titanium and gold. The research team…