The hot spring water contains minerals and trace elements such as strontium, lithium, selenium, and other silicic acid mineral elements.
en.wikipedia.org Strontium aluminate based pigments are now used in exit signs, pathway marking, and other safety related signage.
en.wikipedia.org The toothpaste was first marketed in 1961 as a desensitising toothpaste based on a strontium chloride formulation.
en.wikipedia.org Strontium oxide aluminate based pigments are now used in exit signs, pathway marking, and other safety related signage.
en.wikipedia.org A similar pattern was found with calcium, strontium, and barium, with sulfur, selenium, and tellurium, and also with chlorine, bromine, and iodine.
en.wikipedia.org