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 […]
gold
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?
In the past, we have discussed how the now-omnipresent and affordable aluminum was once more expensive than gold. Treating it as precious and exotic, Emperor Napoleon […]
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 […]