Mica is the name applied to a group of minerals that form in layers at once flexible and strong. A longtime staple of the cosmetics industry, mica is known for adding sparkle to makeup products and paints. But it’s also prized in the electronics and automotive worlds due to its ability to transmit electric force without overheating, even under extreme temperatures. NBC News reports from the Mica mines of Madagascar, where child labor and unsafe working conditions are the norm. NBC News