Larvikite, also known as Norwegian Moonstone, crystal thumb / worry stones. The colouring of these stones is black with iridescent flashes. The front sides have indentations which should be used to rub your thumb over to distract your mind and reduce worry and stress.
This stone connects to spirit guides.
See more thumb / worry stones here
Country of origin: Norway
Size: 4.8 x 4 x 1 cm approx measured at the largest points
Weight: 28 grams approx