# siderite

> English word · Noun

## Definitions
1. a widespread brown mineral, FeCO₃, having the structure of calcite.
2. an iron meteorite
3. An indigo-blue variety of quartz.
4. magnetic iron ore; lodestone

## Etymology
From Ancient Greek σιδηρίτης (sidērítēs, “made of iron”), from Ancient Greek σίδηρος (sídēros, “iron”), or from Latin sideritis (“lodestone”), from Ancient Greek σιδηρῖτις (sidērîtis, “loadstone”). By surface analysis, sider- + -ite.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/siderite