Colorless, milky white, peach, or gray body color showing a floating blue or silvery billowy light sheen (adularescence)...
Chemical formula
(K,Na)AlSi₃O₈ (Potassium-Sodium Aluminum Silicate lamellar intergrowth)
Feldspar • Labradorite (Plagioclase Feldspar Series)
Labradorite
Smoky dark gray body color flashing electric iridescent peacock blue, gold, green, and violet (labradorescence) via lamellar interference.
(Ca,Na)(Al,Si)₄O₈ (50–70% Anorthite, 30–50% Albite)Mohs 6.0 – 6.5 Mohs
Mineralogical & Gemological Profile
| Mineral Family | Feldspar |
|---|---|
| Mineral Species | Labradorite (Plagioclase Feldspar Series) |
| Gemological Variety | Labradorite & Spectrolite |
| Chemical Composition | (Ca,Na)(Al,Si)₄O₈ (50–70% Anorthite, 30–50% Albite) |
| Crystal System | Triclinic |
| Mohs Hardness | 6.0 – 6.5 Mohs |
| Specific Gravity | 2.68 – 2.72 |
| Refractive Index | 1.559 – 1.568 |
Color Characteristics & Optical Behavior
Smoky dark gray body color flashing electric iridescent peacock blue, gold, green, and violet (labradorescence) via lamellar interference.
Geological Context & Pakistani / Global Localities
Crystallizes in mafic igneous anorthosites and pegmatites in Madagascar, Canada (Labrador), and Finland.
Collector Interest & Rarity Factors
Full-spectrum purple, sunset-orange, and peacock-blue flash cabochons.
Fine Jewelry Applications
Statement pendants, bezel-set rings, and cufflinks oriented to maximize flash angle.
Treatment Considerations & Disclosure
Untreated natural stone.
Care & Cleaning Instructions
Clean with warm soapy water; avoid ultrasonic cleaning and sharp impacts.
Traditional Meaning
Traditional Symbolism & Cultural Heritage
Celebrated in northern legends as the 'Aurora Borealis trapped in stone', symbolizing transformation and artistic vision.
Note: Cultural and birthstone traditions are presented strictly as historical folklore, never as scientifically verified medical or metaphysical effects.
Feldspar
Related Entries
Warm golden, peach, or coppery-red body color sparkling with metallic schiller (aventurescence) from aligned specular hematite or copper...
Chemical formula
(Na,Ca)(Al,Si)₄O₈ with Hematite or Native Copper platelets