Her chosen materials were four: a chunk of ancient granite from the Yucatán, a synthetic ceramic codenamed "Tearstone," a nickel-iron alloy mimicking a meteorite, and a piece of seafloor peridotite.
She wrote in her log that night: "An equation of state is not a prediction. It is a confession. Every material tells you how hard it is willing to be loved by pressure. The peridotite confessed it was never afraid of the dark." Equation Of State And Strength Properties Of Selected
The Core of the Matter