(1) One mini Larvikite Sphere will be intuitively chosen for you, each crystal will very slightly in colour and size. Mini Larvikite Spheres are approximately 20mm.
Larvikite is an igneous rock, specifically a variety of monzonite, notable for the presence of thumbnail-sized crystals of feldspar. These feldspars are known as ternary because they contain significant components of all three endmember feldspars.