IMA mineral species
Gregoryite
Na₂(CO₃)
Carbonate mineral.
Properties
⛏ Mohs hardness3
💅🪙🍶🔪💎
A copper coin scratches it.
⚖ Density2.651 g/cm³
Average
🔷 Hexagonal✏️ streak white
| Chemical formula | Na₂(CO₃) |
|---|---|
| Elements | Na, C, O |
| Crystal system | Hexagonal |
| Mohs hardness | 3 |
| Density | 2.651 g/cm³ |
| Streak | white |
| Color | — |
| IMA symbol | Ggy |
| Nickel–Strunz class | 5.AA.10 |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
Care & Handling
- 🪶 Soft, Scratches Easily Mohs 3: softer than a steel knife, so it scratches easily. Store it apart from harder stones.
🌍 Where it's found
Type locality (where it was first described): Ol Doinyo Lengai, Tanzania
- Type locality
- Notable source / deposit
- Country of origin
Marker positions are approximate (region or locality level). Type localities from Wikidata; notable sources curated by Crystopedia.
Learn more
- Gregoryite on Mindat.org
- Wikipedia article
- Wikidata item Q3776579 (source of this page's data – you can correct it there)
IMA mineral species
3–4
Hexagonal
BrownWhite & Clear
Soft, Scratches Easily