Aeschynite | Gemopedia

Learn all there is to know about Aeschynite gemstones. Discover everything from color variety, care tips, and gemstone value and become an Aeschynite expert!
Alternate
Names
Aeschinite, Blomstrandine, Blomstrandinite, Eschynite, Priorite,Syn., Priorite,Taiyite
Colors
Black, Brownish Black, Brown, Brownish Yellow, Yellowish

Aeschynite Classification

Common Name

Aeschynite

Species

Aeschynite

Variety

Colors

Black, Brownish Black, Brown, Brownish Yellow, Yellowish

Alternate Names

Aeschinite, Blomstrandine, Blomstrandinite, Eschynite, Priorite,Syn., Priorite,Taiyite

Gemstone Groups

Key Separations

Comments

Aeschynite is often radioactive. Found in pegmatite and placer deposits. Mineral specimens can be cleaned with dilute acid. Aeschynite is named after the Greek word for shame because early chemists were unable to distinguish the components that made up the crystal.

Aeschynite Optical Properties

Transparency

Semitransparent - Opaque

Refractive Index

Over the Limit 2.19-2.5

Birefringence

0.15-0.22

Optic Character

Biaxial

Optic Sign

Positive

Polariscope Reaction

Doubly Refractive (DR)

Fluorescence

SWUV: Iner
LWUV: Inert

CCF Reaction

Pleochroism

None

Dispersion

Strength: strong fire

Comments

Aeschynite Chemistry & Crystallography

Chemical Name

yttrium calcium iron titanium niobium hydroxide

Chemical Formula

(Y, Ca, Fe, Th) (Ti, Nb)2 (O, OH)6

Synthesis

Crystal System

Orthorhombic

Classification

Oxide

Nature

Natural

Crystallinity

Crystalline

Comments

Aeschynite Characteristic Physical Properties

Hardness

5-6

Streak

Reddish Yellow

Specific Gravity

4.85-5.19 Typical:4.95

Toughness

Poor

Inclusions

Luster

Vitreous

Stability

Fracture

Conchoidal

Cleavage

Poor

Comments

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