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The two elements from the display that go into cellphone cameras are:

Aluminum and Calcium

Aluminum is found in aluminum foil, and calcium is found in gypsum, calcite, and selenite. Along with those minerals, bastnaesite , sphalerite, nickeline, hematite, copper, clausthalite, bauxite (also aluminum), arsenopyrite, cassiterite and chromite are also found in cellphone cameras, aluminum is used to support the frame of the camera and is found in China, and calcium is used to protect and reduce glare on camera lenses, and is found in almost every country, these elements make it possible to scan QR codes like this one and take pictures.