Hastingsite
A variety of Minerals
What is Hastingsite?
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Hastingsite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Hastingsite Localities Map
See where Hastingsite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- black, dark-green, greenish-brown, yellow
- Hardness (Mohs)
- 5 - 6
- Streak
- greenish grey
Chemical Properties
- Chemical Formula
- {Na}{Ca2}{Fe2+4Fe3+}(Al2Si6O22)(OH)2
- Elements
- Al, Ca, Fe, H, Na, O, Si
Also Known As

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Hastingsite FAQs
How do I identify Hastingsite?
Hastingsite can be identified by its hardness of 5 - 6 on the Mohs scale, black color. Look for these key characteristics when examining specimens.
What color is Hastingsite?
Hastingsite typically appears in black, dark-green, greenish-brown, yellow. Color can vary depending on impurities and formation conditions.
How hard is Hastingsite?
Hastingsite has a hardness of 5 - 6 on the Mohs scale. This gives it moderate hardness.


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