Aerinite
A variety of Minerals
What is Aerinite?
Aerinite (Ca4(Al,Fe,Mg)10Si12O35(OH)12CO3·12H2O) is a bluish-purple inosilicate mineral. It crystallizes in the monoclinic system and occurs as fibrous masses and coatings. It has a dark, vitreous luster, a specific gravity of 2.48 and a Mohs hardness of 3. It is a low-temperature hydrothermal phase occurring in zeolite facies alteration of mafic rocks. Associated minerals include prehnite, scolecite and mesolite. Its name comes from a Greek root "aerinos," meaning "atmosphere" or "sky".
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Aerinite 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.
Aerinite Localities Map
See where Aerinite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
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Quick Facts
Physical Properties
- Color
- blue to blue-green
- Hardness (Mohs)
- 3
- Streak
- bluish white
Chemical Properties
- Chemical Formula
- (Ca5.1Na0.5)(Fe3+,Al,Fe2+,Mg)4(Al,Mg)6[HSi12O36(OH)12][(CO<sub>3</sub>)<sub>1.2</sub>(H<sub>2</sub>O)<sub>12</sub>] According to Rius et al. (2009), the formula of the Fe3+-rich variety includes SO3 (sulphite) substitution for carbonate.
- Elements
- Al, C, Ca, Fe, H, Mg, Na, O, Si
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Aerinite FAQs
How do I identify Aerinite?
Aerinite can be identified by its hardness of 3 on the Mohs scale, blue to blue-green color. Look for these key characteristics when examining specimens.
What color is Aerinite?
Aerinite typically appears in blue to blue-green. Color can vary depending on impurities and formation conditions.
How hard is Aerinite?
Aerinite has a hardness of 3 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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