Blue Kyanite: The Only Guide You Need
The word Kyanite is derived from the Greek word Kyanos which means dark blue. Blue Kyanite is among the most common variety of Kyanites. The most important property of this…
Black Tourmaline: Meaning, Properties & Uses
A natural stone, black tourmaline features high contents of ions, aluminum, lithium, magnesium, potassium, and sodium. Amongst the different colors of the tourmaline stone, black is one of the most…