How should I use the harmonising spheres made of shungite and flint correctly? — Harmonizer spheres 4 cm shungite + tulikivi

According to the manufacturer's description, the spheres are used as a pair: one is held in the left hand, the other in the right. It is recommended to relax and hold the spheres for 10 minutes in the morning and evening; use them for up to 2 weeks in a row, then take a 2–3 week break. The small spheres can be carried in a pocket.

The product card gives no specific technique. General practice (not a manufacturer's instruction): sit comfortably, hold the spheres in relaxed palms without squeezing them, and breathe evenly and calmly. The spheres are an accessory for relaxation practices, not a medical device; the description lists contraindications: pregnancy, mental illness and age under 12.