Beneath the thin crust of continents and oceans lies the mantle — a vast layer that makes up roughly 84% of Earth’s volume and nearly two-thirds of its mass. The upper mantle is composed primarily of peridotite, a dense, olivine-rich rock. The mantle is massive and opaque. Everything on Earth's surface — mountains, cities, oceans — rests on this dark, unseen mass. Who this collection is for: Your core is strong, even when it goes unnoticed. In the end, it keeps you grounded. The structure and integrity of your soul will outlast short-term reputation and illusions. (Righteousness)