Aloha Bay Salt Crystal tea light candle holders are made from salt crystal rocks formed by nature hundreds of millions of years ago and mined over 500 yards underground from the foothills of the Himalayas. When mining the salt crystals, explosives are strictly prohibited to preserve the structures of the crystals. Candle holders are carefully crafted by hand to retain the unique, beautiful and natural shape of the rock. The result is a rare crystal with such beautiful colors ranging from off-white to apricot and warm pink. As the tea light flame warms up the lamp, healthful negative ions lift off from the surface and help to cleanse and improve the quality and freshness of the air you breathe.