This post (with a couple of updates at the end) is from 2018. Mantle gems include diamonds and peridots. These form under intense heat and
Watch as red zircons are dug out of the soil in Ratanakiri, Cambodia, and turned into sky-blue gemstones by heat treatment in somebody’s back-yard mini-furnace.
What do former Russian royals and the Red Sea have in common?
Gems, of course–in particular, one famous peridot plus a few smaller ones. All of these stones came from Zabargad Island in the Red Sea.
This post, based on something I wrote for Helium back in 2011, was first blogged here in 2013. However, it’s a natural tie-in to yesterday’s
Aquamarine is a beryllium mineral like bertrandite or beryl, but its chemical formula is slightly different. Who would suspect that the addition of a little
Turquoise made headlines recently when researchers discovered that Mesoamericans had more than one source for this gem that they valued highly. Not all of it