Nepheline
Nepheline is a mineral with the chemical formula Na3KAl4Si4O16. It has a Mohs hardness of 5.5 - 6 and vitreous to greasy luster.
Nepheline properties
| Type | Mineral |
|---|---|
| Chemical formula | Na3KAl4Si4O16 |
| Mohs hardness | 5.5 - 6 |
| Luster | Vitreous to greasy |
| Typical colors | Colorless, gray, white, yellow, green, blue |
| Formation | Occurs in igneous rocks, particularly in syenites and phonolites |
| Rarity | 4 / 10 |
Mohs hardness 5.5–6 — fairly hard
1 · Talc5 · Apatite10 · Diamond
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