Stonehenge Bluestone Meaning and Properties
Bluestone is a term used to describe several types of building stone, including basalt, dolerites, feldspathic sandstone, limestone, and slate. At Stonehenge, the term bluestone is a catch-all ...
9 ᛜ Hard
Moissanite
A Dazzling Discovery by Henri Moissan In 1893, the world of gemstones was forever changed when French chemist Henri Moissan made an extraordinary discovery. While exploring the depths of a meteor ...
