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
Here is more information on carnelian, which is very close to chalcedony. Featured image: Source, public domain. (Thank you, Metropolitan Museum of Art and Wikipedia!)
After that, do you really want to know what the Kentucky Geological Survey has to say about gold and silver in this US state? Featured
Almost 30 million years ago, an asteroid or comet impact fused Saharan quartz grains into desert glass.