This jet black heart shape wonder belongs to the Tourmaline family and is often referred to as Schorl. Typically, it takes the form of long columnar crystals with triangular cross-sections and striped surfaces, but in this case it has been cut into a heart palm stone, and polished.
A tourmaline crystal is made up of six-membered silica rings that attach to a massive cation, such as sodium, above them. There are several variants of Tourmaline depending on their shades, yet Black Tourmaline is quite exceptional.
Measurements are approximately: This Black Tourmaline heart palm stone is 1.5 inches in height and 1.5 inches in width.
We have been asked "Can black tourmaline go in water"? Yes, it can.