100% Satisfaction Guaranteed - All Runyangshi crystal are covered under 100% 30 day money back guarantee. We’re sure you will love our unique quartz. However, if you are unsatisfied with any items, just contact us if you have any questions, we'll give you a satisfied solution. Ideal for use by crystal collectors and enthusiasts, vibrational healers, reiki therapists and other energy workers. Suitable for Home&office decoration, crystal collecting, a terrific gift idea for those who are just beginning to experiment with healing crystals. Usage - Good For healing, meditation, chakra balancing, energy magnification, energy charged, protection, Fengshui, manifestation, paperweight, home decoration, amulet etc. Size - Width about 1.6x1.6in (4x4cm) Please expect variations in size, shape, color,and crystal transparency. Please noted that each item is different and unique, the crystals pictures are for display purposes only. What you get - 1 PCS one and only your own natural Black Obsidian crystal pyramid energy generator, as there are no same crystals in the world which make it special.