Augelite
A variety of Minerals
What is Augelite?
Augelite is a rare mineral that is semi-transparent and may take on several hues, ranging from blue to pink to green or colorless. Augelite crystals may be large enough to cut gemstones out of, but because the stone is both soft and brittle, it is rarely of interest to anyone beyond collectors.
Etymology & Origins
It was first described by Christian Wilhelm Blomstrand for an occurrence in Västanå iron mine at Scania, Sweden in 1868 and derives its name from the Greek αύγή in reference to its pearly lustre.
Uses & Applications
Augelite does not have many industrial or household uses. However, because it is commonly found in ore deposits, it can be an apt indicator of other important rocks and minerals, including metallic minerals like hematite and pyrite. Occasionally it may be carved and used as a gemstone.
Optical Properties
- Refractive Index
- 1.570-1.591
- Birefringence
- 0.020-0.021
- Pleochroism
- None
- Optical Character
- Biaxial positive
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Augelite 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.
Augelite Localities Map
See where Augelite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Formation of Augelite
It occurs as a product of metamorphism of phosphate bearing peraluminous sediments and in high-temperature hydrothermal ore deposits. It occurs in association with attakolite, svanbergite, lazulite, hematite, trolleite, berlinite, rutile, pyrophyllite, baryte, arsenopyrite, stannite, pyrite, andorite, cassiterite and zinkenite.
Quick Facts
Physical Properties
- Color
- White, colourless, pale yellow, light green, rarely blue, pink, colourless in transmitted light
- Hardness (Mohs)
- 4.5 - 5
- Density
- 2.704 g/cm³
- Streak
- White
- Luster
- Pearly, Vitreous, Resinous, Sub-vitreous
- Crystal System
- Monoclinic
Chemical Properties
- Chemical Formula
- Al2(PO4)(OH)3
- Elements
- Al, H, O, P
Also Known As
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Augelite FAQs
How do I identify Augelite?
Augelite can be identified by its hardness of 4.5 - 5 on the Mohs scale, White color, Pearly, Vitreous, Resinous, Sub-vitreous luster, Monoclinic crystal system. Look for these key characteristics when examining specimens.
What color is Augelite?
Augelite typically appears in White, colourless, pale yellow, light green, rarely blue, pink, colourless in transmitted light. Color can vary depending on impurities and formation conditions.
How hard is Augelite?
Augelite has a hardness of 4.5 - 5 on the Mohs scale. This gives it moderate hardness.
What is the formation of augelite of Augelite?
It occurs as a product of metamorphism of phosphate bearing peraluminous sediments and in high-temperature hydrothermal ore deposits. It occurs in association with attakolite, svanbergite, lazulite, hematite, trolleite, berlinite, rutile, pyrophyllite, baryte, arsenopyrite, stannite, pyrite, andorite, cassiterite and zinkenite.
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