По поводу ионов пока непонятно, ждемс. 
Beyond their crystalline beauty, these Jurassic-era Himalayan salt rocks are treasured for their restorative powers. Set on a coffee table, nightstand or counter, the salt lamp naturally discharges negative ions into the air, which counter the positive ion pollutants caused by home appliances, smoke, carbon dioxide and poor ventilation. Helps relieve stress, headache, sinus and asthma symptoms; enhances the immune system; and improves learning and alertness. Что думаете?
Кроме того ее можно сьесть, если надоест. 
