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.
Topaz is the hardest silicon-based mineral, and its clarity and beautiful color make this a beautiful and very popular gemstone. Topaz got its name from
Microphotgraphy using polarized light yields beautiful art. It also is very helpful in learning more about a gem.
Update, August 12, 2018: Thai food is delicious–why do these little endoliths feel they need to chow down on garnets? Mantle gems include diamonds and
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.