Labradorite — Properties, Meaning, and Uses

Labradorite is a plagioclase feldspar ((Ca,Na)(Al,Si)₄O₈) of the albite-anorthite series with a hardness of 6—6.5 Mohs. Its most characteristic feature is labradorite, a blue-green-golden iridescence caused by light interference between submicroscopic lamellae of two feldspars. The main deposits are found in Madagascar — which supplies the global market for collector's items — and on the Labrador Peninsula (Canada), where it was described in 1770.

Property	Value
Mineralogical name	Labradorite (plagioclase An₅₀₋₇₀)
Chemical formula	(Ca,Na)(Al,Si)₄O₈
Mineral group	Tectosilicates → feldspars → plagioclases
Crystal system	Triclinic — pinacoidal class
Hardness (Mohs)	6—6.5
Density	2.69—2.72 g/cm³
Luster	Vitreous to pearly
Cleavage	Perfect in two directions (angle ~86°)
Fracture	Irregular to conchoidal
Base color	Gray to black; semi-transparent to opaque
Streak	White
Diaphaneity	Translucent to opaque
Optical phenomenon	Labradorescence (interference iridescence)
Main deposits	Canada (Labrador), Finland, Madagascar, Russia, Mexico, USA

What is Labradorite?

Labradorite is a member of the plagioclase series, the group of feldspars that form with different proportions of calcium and sodium: at the sodic end is albite (NaAlSi₃O₈) and at the calcic end is anorthite (CaAl₂Si₂O₈). Labradorite occupies the An₅₀—An₇₀ position of this series — between 50% and 70% of the anorthite component.

Its name comes from the Labrador Peninsula (Canada), where it was first scientifically described by Moravian missionaries in the 18th century, although the Labrador Inuit had known and used the mineral long before.

In the market, it is also known as "spectrolite" when it comes from Finland and displays full-spectrum labradorescence (all colors of the rainbow in a single specimen). Completely transparent or very translucent labradorite with strong labradorescence is called "andesine labradorite" in gemology and can be faceted.

Physical and Chemical Properties

Composition and Crystal Structure

Labradorite has a tectosilicate structure with three-dimensionally linked SiO₄ and AlO₄ tetrahedra. Its particularity lies in its internal microstructure: it contains alternating lamellae of albite and anorthite on a nanometer scale (lamellar exsolution), resulting from slow cooling from a high-temperature state. These lamellae are directly responsible for labradorescence.

Hardness, Toughness, and Durability

With a hardness of 6—6.5 Mohs, labradorite is suitable for most jewelry uses but requires caution: its perfect cleavage in two directions makes it susceptible to splitting with impact. In pieces set in everyday rings, it can chip along the cleavage planes if struck at the wrong angle. For pendants and earrings, where the risk of impact is lower, its durability is excellent.

Optical Properties — Labradorescence

Labradorescence is the optical phenomenon that defines this stone. It occurs when light enters the internal lamellar structure and reflects off multiple layers with separation on the scale of visible light wavelengths. Constructive and destructive interference between layers of different composition produces intense colors that change depending on the observation angle.

The most common colors are electric blue and green. The rarest — and most prized — are red, orange, and violet. Finnish spectrolite specimens can show all the colors of the spectrum in a single piece. The intensity of the labradorescence depends on the cutting orientation relative to the internal lamellar planes.

Other Properties

Labradorite does not exhibit significant UV fluorescence. It is not piezoelectric. It can exhibit adularescence (a floating pearly sheen) when the layers are oriented differently — in this case, it is called "moonstone labradorite" in English-speaking markets, although "classic" adularescence belongs to orthoclase.

Where is Labradorite Found?

Labradorite is an igneous rock mineral — it appears mainly in gabbros, basalts, and anorthosites. Also in some high-grade metamorphic rocks.

• Canada — Labrador Peninsula: The type locality. Labradorite in anorthosite, primarily used as decorative material in slabs and cabochons. Predominantly blue and green labradorescence.
• Finland — Yläma: Produces spectrolite, considered to have the highest quality color spectrum. Full rainbow colors in a single piece. Highly valued in high-end jewelry.
• Madagascar: World's leading exporter by volume for the decorative mineral market. Medium-to-high quality material with good blue-green labradorescence. At Anima Mundi Crystals, we primarily work with labradorite from Madagascar.
• Russia — Kola Peninsula: Good quality blue labradorite; important in the European market.
• Mexico — Oaxaca: Labradorite with blue to green labradorescence, extracted artisanally.

Uses of Labradorite

In Jewelry and Lapidary

Labradorite is almost exclusively worked as a cabochon — the shape that maximizes the visibility of labradorescence. The optical axis of the phenomenon is perpendicular to the lamellar planes, so the lapidary orients the cut so that the labradorescence is visible when the cabochon's dome faces the viewer.

It is one of the most used stones in contemporary handcrafted jewelry: its blue and green flashes work especially well in oxidized silver and in geometric pieces. At Anima Mundi Crystals, we select labradorite from Madagascar with intense blue-green labradorescence for our cabochons, prioritizing the cut angle over size to maximize the visual effect.

For exploring finished pieces with labradorite, visit our all jewelry section.

In Architecture and Decoration

Slab labradorite is widely used in high-end interior architecture: countertops, wall cladding, and floors that display labradorescence in appropriate lighting. "Labradorite granite" (a gabbro with abundant labradorite) is one of the most demanded decorative building materials in Europe.

In Decoration and Collecting

Large rough labradorite specimens and high-quality loose cabochons are highly sought-after collector's items. Labradorite spheres, when well-oriented, display a halo of labradorescence that makes them highly impactful decorative objects.

Labradorite in Cultural and Spiritual Tradition

The properties described in this section belong to the cultural tradition of crystal healing and do not constitute medical advice.

History and Ancestral Uses

The Inuit of Labrador believed that the aurora borealis had been trapped in the stone — the blue-green labradorescence was for them the manifestation of this celestial phenomenon in mineral form. This connection to the aurora borealis influenced its commercial name in English (Aurora Stone) in the 19th century.

In Inuit culture, labradorite was used as a protective amulet and carved into small animal figures. When Moravian missionaries sent it to Europe in the 18th century, it quickly became a fashionable gem in European courts, where its labradorescence caused a fascination documented in letters of the time.

Meaning in Different Cultures

In modern Scandinavian tradition, labradorite is "the stone of the north" — its connection to the aurora borealis links it to magic and the world between the visible and the invisible. In Finnish tradition, spectrolite is a symbol of national identity. In 20th-century crystal healing, labradorite was adopted as a stone of protection and transformation, partly because of its ability to show hidden colors only when light hits it at the right angle.

Attributed Properties in Crystal Healing

Spiritual: In contemporary crystal healing, labradorite is considered a stone of energetic protection and opening perception. It is associated with the ability to see what is "behind" appearances — a direct metaphor for the labradorescence that reveals hidden colors beneath the gray surface.

Emotional and psychological: Labradorite is attributed with an effect on creativity, intuition, and openness to new perspectives. In crystal healing practice, it is used in meditations for mental clarity and in processes of personal change where the aim is to access non-obvious internal resources.

Chakras and Associations

Property	Association
Chakra	Third Eye (Ajna) / Throat (Vishuddha)
Element	Water / Air
Planet	Uranus / Moon
Zodiac sign	Leo, Scorpio, Sagittarius
Number	6, 7

How to Identify Authentic Labradorite

Basic Tests

Authentic labradorite is identified by its characteristic labradorescence — there is no common imitation that faithfully reproduces this internal optical interference effect. When turning a piece under incident light, metallic colors should appear and disappear depending on the angle, from within the stone, not from the surface.

Hardness (6—6.5) and perfect cleavage in two planes are additional characteristics. With a metal needle, you can verify that it does not scratch easily (discard plastic or resin imitations).

Common Confusions

"Laboratory opal" or synthetic opal with a play-of-color effect can be confused with labradorite from a distance, but the play of color in opal is different (fragmented patches vs. continuous fields of color). Moonstone (orthoclase) has bluish-white adularescence but not multicolored labradorescence. Some plastic fantasies with internal metallic lamellae superficially imitate the effect, but the regularity of the pattern and the lack of depth betray them.

Care and Maintenance

Cleaning

Labradorite should be cleaned with lukewarm water and mild soap, rinsing thoroughly. Avoid ultrasonic cleaners — vibrations can exploit cleavage in pieces with incipient cleavage. Dry with a soft cloth. Do not use steam on pieces with fractures or inclusions.

Storage and Precautions

Store separately from harder materials that could scratch the polished surface. Handle with care to avoid impacts on the edges — the perfect cleavage makes it prone to flaking at the edges if struck. Pieces set in silver should be stored in a cloth bag to prevent contact with other metal objects.

More information in our jewelry and mineral care guide.

Labradorite at Anima Mundi Crystals

We work primarily with labradorite from Madagascar, selecting cabochons for the intensity and breadth of their labradorescence — we prioritize electric blue and metallic green over pieces with a weak or localized effect. At Anima Mundi Crystals, we evaluate each cabochon under directed light to verify that the optical phenomenon is visible from multiple angles.

Find our selection of labradorite cabochons for jewelry and decorative pieces in rough minerals. For larger labradorite spheres and slabs, please inquire.

Frequently Asked Questions about Labradorite

Why does labradorite change color?

Labradorescence is an optical interference phenomenon — just like the colors in a soap bubble or oil on water. The internal structure of labradorite contains alternating lamellae of two types of feldspar (albite and anorthite) on a nanometer scale. Light entering these layers reflects at multiple points, and the waves either reinforce or cancel each other out depending on the angle, producing intense colors that change with perspective.

What is spectrolite?

Spectrolite is labradorite from the Yläma mine in Finland that displays full-spectrum labradorescence: blue, green, yellow, orange, red, and violet visible in a single specimen at different angles. It is the highest quality and most expensive variety. The term is partly a trade name — mineralogically it is the same labradorite, just with better labradorescence quality.

Is labradorite suitable for rings?

With precautions. A hardness of 6—6.5 is sufficient for occasional use, but its perfect cleavage makes it fragile to impacts on the edges. For everyday rings, a bezel setting (which protects the stone's edge) is much more suitable than a prong setting. For pendants and earrings, there are no significant restrictions.

How is a labradorite cabochon's cut oriented?

The lapidary must orient the cut so that the internal lamellar planes are parallel to the base of the cabochon. This way, when light enters through the polished dome perpendicular to these layers, labradorescence is maximized. A poorly oriented cabochon may show weak or nonexistent labradorescence even if the rough stone is of high quality.

Where is the best labradorite in the world found?

Finnish spectrolite from Yläma is generally considered to have the highest chromatic quality — a full spectrum of colors in a single piece. Labrador (Canada) has the type locality with classic blue-green labradorescence. Madagascar produces the best value-for-money material for the handcrafted jewelry market.

What is labradorite used for in crystal healing?

In crystal healing practice, labradorite is associated with energetic protection, intuition, and openness to hidden perspectives. It is used in meditations for mental clarity and in processes of personal transformation. These are cultural attributions within a specific tradition, not scientifically verified properties.

What is the difference between labradorite and moonstone?

Both are feldspars, but of different species: labradorite is a plagioclase (albite-anorthite series) with multicolored labradorescence; moonstone is orthoclase (potassium feldspar) with adularescence — a bluish-white floating sheen. Labradorescence appears in flashes of metallic colors; adularescence is a diffuse nebulous sheen. They are distinct optical phenomena produced by similar mechanisms in related minerals.

Recommended Bibliography

• Gienger, M. (1998). Crystal Power, Crystal Healing. Blandford.
• Simmons, R. & Ahsian, N. (2005). The Book of Stones. Heaven & Earth Publishing.
• Hall, J. (2003). The Crystal Bible. Gaia Ediciones.
• Labradorite — Mindat.org
• Labradorite — Wikipedia