Amblygonite
| Colour | White, Yellow |
|---|---|
| Mohs hardness | 5.5–6 |
| Lustre | Vitreous to pearly |
| Crystal system | Triclinic |
| Cleavage | [100] Perfect, [110] good, [011] distinct |
| Fracture | Irregular/ineven, sub-Conchoidal |
| Specific gravity | 2.98–3.11 |
What is Amblygonite?
Amblygonite is a fluorophosphate mineral, (Li,Na)AlPO4(F,OH), composed of lithium, sodium, aluminium, phosphate, fluoride and hydroxide. The mineral occurs in pegmatite deposits and is easily mistaken for albite and other feldspars. Its density, cleavage and flame test for lithium are diagnostic. Amblygonite forms a series with montebrasite, the low fluorine endmember. Geologic occurrence is in granite pegmatites, high-temperature tin veins, and greisens. Amblygonite occurs with spodumene, apatite, lepidolite, tourmaline, and other lithium-bearing minerals in pegmatite veins. It contains about
How to identify Amblygonite
- Lustre: Vitreous to pearly.
- Hardness: Mohs 5.5–6 — about as hard as a steel knife.
- Habit: Triclinic crystal system.
Amblygonite in different forms
Stones often confused with Amblygonite
Frequently asked questions
How hard is Amblygonite?
Amblygonite is Mohs 5.5–6 on the hardness scale.
What colour is Amblygonite?
Amblygonite is typically white, yellow (Generally white or creamy, but can also be colorless or pale yellow, green, blue, beige, gray, brown or pink).