https://www.space.com/55-earths-moon-formation-composition-and-orbit.html
The average composition of the lunar surface by weight is roughly 43% oxygen, 20% silicon, 19% magnesium, 10% iron, 3% calcium, 3% aluminum, 0.42% chromium, 0.18% titanium and 0.12% manganese.
Good — at least they won’t be pilfering it for battery components.