siderite
/ˈsɪdəraɪt/
noun
- A mineral composed mainly of iron carbonate, often found in sedimentary rocks and used as an iron ore.
- The rock sample contained siderite crystals with a brownish color.
- Geologists identified siderite in the ancient seabed deposits.
- Siderite is an important source of iron in some mining regions.
- A meteorite made mostly of iron and nickel.
- The siderite was found in a crater in the desert.
- The museum displayed a siderite that fell to Earth thousands of years ago.
- Collectors prize siderites for their metallic composition and unique patterns.