Augelite

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Physical & Optical Properties

Mohs Hardness 4.5 – 5.0
Specific Gravity 2.7 – 2.75
Refractive Index 1.57 – 1.591
Crystal System Monoclinic
Fracture Conchoidal
Color various
Birefringence 0.02
Pleochroism Nil

Mohs Hardness

Mohs Hardness: 4.5 – 5.0
1 Soft10 Hard

Crystal System

β a b c Monoclinic a ≠ b ≠ c, α = γ = 90°, β ≠ 90°

Value & Market

Price Tier Budget (< $50/ct)

About Augelite

Augelite is a rare aluminum phosphate mineral forming colorless to pale yellow or white tabular crystals, primarily in phosphate-rich pegmatites and hydrothermal veins. Gem-quality transparent crystals come mainly from Bolivia and Peru, where miners occasionally recover facetable material; however, perfect cleavage in multiple directions makes cutting extremely challenging. Despite its relative obscurity, augelite's vitreous luster and clean transparency attract dedicated collector-cutters.

Jewelry Use

Durability 3/10

Science FYI Family

Frequently Asked Questions

What is Augelite?
Augelite is a rare aluminum phosphate mineral forming colorless to pale yellow or white tabular crystals, primarily in phosphate-rich pegmatites and hydrothermal veins. Gem-quality transparent crystals come mainly from Bolivia and Peru, where miners occasionally recover facetable material; however,
What is the hardness of Augelite?
Augelite has a Mohs hardness of 4.5 to 5.0, making it relatively soft for use in jewelry.
What color is Augelite?
Augelite is primarily Various.
How much does Augelite cost?
Augelite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Augelite?
Augelite belongs to the Monoclinic crystal system.

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