Gravity: Geiger Counter Module Ionizing Radiation Detector

Ionizing radiation, invisible and intangible, exists not just in nuclear reactors—we’re constantly exposed to it from the environment and outer space, though our bodies resist natural background radiation. High-energy ionizing radiation can come from natural marble, colored ore gems, or "negative ion powder" with radioactive elements. A Geiger counter detects these sources. It’s also a good random number generator: undetermined high-energy particle ionization events provide true random entropy, not algorithm-based sequences.