igneous
Stardust (Micrometeorite)
Chondrite / Micrometeorite (Extraterrestrial Silicate)
Hardness: 5-6 (Mohs); Color: Black, charcoal grey, or dark brown; Luster: Metallic to sub-metallic; Structure: Often spherical or irregular scoria; Specific Gravity: 3.0-3.8.
- Hardness
- 5-6 (Mohs)
- Color
- Black, charcoal grey, or dark brown
- Luster
- Metallic to sub-metallic
Identified More igneous →
Explore Stardust (Micrometeorite) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 5-6 (Mohs); Color: Black, charcoal grey, or dark brown; Luster: Metallic to sub-metallic; Structure: Often spherical or irregular scoria; Specific Gravity: 3.0-3.8.
Formation & geological history
Formed from the debris of the early solar system roughly 4.6 billion years ago. These particles enter Earth's atmosphere at high speeds, melting into 'cosmic spherules' due to friction before settling on the surface.
Uses & applications
Primarily used for scientific research to understand the chemical composition of the early solar nebula and the origins of water/organic molecules on Earth.
Geological facts
Approximately 5,200 tons of micrometeorites fall to Earth every year. They are the most common form of extraterrestrial matter found on our planet.
Field identification & locations
Identified by their magnetic properties and unique spherical shape under a microscope. Collectors often find them by placing magnets in rain gutters or searching in clean, isolated environments like Antarctic ice or deep-sea sediments.
