Perplexed, the site manager called in a geologist from the nearby state university. The researcher arrived with a portable X-ray fluorescence (XRF) scanner, aiming the device at the dark metallic streaks running through the stone. When the machine chimed, the geologist stared at the digital readout, his face losing all color. The rock’s outer crust was heavily saturated with Scheelite—the primary raw ore source of tungsten.
Tungsten is famously one of the densest, heaviest, and most heat-resistant metals on Earth, which explained why it broke the tools. But the geologist immediately pointed out a glaring anomaly. Scheelite forms in jagged, microscopic veins deep underground. It does not naturally form a smooth, rounded capsule like this.
“And there’s a massive problem with the physics,” the geologist muttered, calculating the rock’s volume against its weight. “Even if this boulder were made of solid tungsten, it should weigh more than half of what just tipped that excavator. There is a completely different material sealed inside this metallic shell.”