How are zircon crystals formed?
Surprisingly, even before this research, scientists knew that zircons were among the oldest objects on Earth, although those older than 4.3 billion years are extremely rare. This fact highlights the significance of the Jack Hills discovery. Zircon is a mineral formed when a specific type of magma cools.
Why are they special?
Zircon crystals are actually crystals of zirconium silicate that emit blue light. Considered extremely durable, these elements can last for billions of years and remain unchanged even under high pressure and temperature, according to scientists. The zircon crystals scientists have found are so small that they are invisible to the naked eye.
Because of their microscopic size, they are expected to contain a wealth of information, acting as time capsules from Earth's early history. This crystal formed 160 million years after the formation of the solar system, just 10 million years after Earth collided with a Mars-sized planet, leading to the formation of the Moon. During this process, Earth transformed into a glowing red ball of molten rock