Labradorite is one of the most well-known minerals in the feldspar group. It is particularly recognized for its striking play of colors, which can glow in shades of blue, green, gold, or even violet when light hits the surface of the stone.

In this article, we will explore the properties, hardness, composition, and formation of labradorite, as well as the origin of its famous iridescence.

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What is labradorite?

Labradorite is a mineral belonging to the feldspar group, more specifically to the plagioclase feldspar series. It was first discovered in Labrador, Canada, from which the stone derives its name.

Labradorite is especially known for an optical phenomenon called labradorescence. Thanks to this, a stone that would otherwise appear gray or dark can strongly shimmer in different colors when light hits it at the right angle.

If you want to read more about the symbolic aspect of labradorite, also check out the article on the meaning of labradorite.

Composition of labradorite

Labradorite belongs to the feldspar group and is chemically a sodium-calcium-aluminum silicate. It is part of the plagioclase feldspar series and falls compositionally between albite and anorthite.

• belongs to the feldspar group
• is a sodium-calcium-aluminum silicate
• part of the plagioclase feldspar series
• forms a crystalline structure

Hardness of labradorite

The hardness of labradorite is generally about 6–6.5 on the Mohs scale. It is therefore harder than, for example, obsidian, but slightly softer than quartz.

Cleavage of labradorite

Labradorite belongs to the feldspar group, whose minerals are characterized by good cleavage. This means that the stone can split quite evenly in certain directions, even though its hardness is relatively high.

In practice, labradorite withstands normal use well, but strong impacts or drops can cause fractures more easily than one might assume based solely on its hardness rating.

The stone's hardness makes it suitable for jewelry, decorative objects, and polished utility items. However, labradorite has distinct cleavage planes, so strong impacts should be avoided.

How does labradorite form?

Labradorite forms as magma cools and crystallizes. Unlike obsidian, which forms from rapidly cooling lava, labradorite requires time to form as a crystalline mineral.

Labradorite occurs particularly in igneous rocks such as basalt, gabbro, and anorthosite. In some anorthosites, a large part of the rock can consist almost entirely of labradorite.

You can compare labradorite to other popular stones by reading articles on the properties of amethyst, the properties of rose quartz, and the properties of obsidian.

Why does labradorite shimmer in different colors?

The most famous characteristic of labradorite is labradorescence. It refers to an optical phenomenon where the internal structure of the stone disperses and reflects light in such a way that strong colors appear on the surface.

The shimmer can be blue, green, golden, orange, or even violet. The colors are not due to pigments, but to the interaction of light with the internal structure of the mineral.

The stronger and more colorful the shimmer in the stone, the more highly labradorite is generally valued.

Spectrolite – Finnish labradorite

Spectrolite is a particularly colorful variety of labradorite found in Finland. It can display almost the entire spectrum of colors, from blue and green to orange, red, and violet.

Spectrolite was discovered in Ylämaa, Southeastern Finland, and is considered one of the most famous Finnish gemstones.

Color and appearance of labradorite

Without light reflection, labradorite is usually gray, grayish-white, or slightly greenish. Its famous play of colors only becomes visible from the right viewing angle.

For this reason, every labradorite looks slightly different depending on the light, cut, and viewing angle.

Where is labradorite found?

Labradorite is found in various parts of the world. Notable occurrences include Canada, Finland, Madagascar, Norway, China, and Australia.

Especially labradorites from Madagascar and Finnish spectrolite are known for their spectacular colors.

Labradorite in jewelry and everyday life

Labradorite is a popular material for jewelry, pendants, bracelets, tumbled stones, and decorative stones. Its biggest appeal is its unique play of colors, which makes each stone individual.

See Ametistikissa's labradorites

The meaning of labradorite for crystal enthusiasts

Among crystal enthusiasts, labradorite is often associated with intuition, transformation, and inner growth. Its spectacular iridescence makes it one of the most popular stones related to intuition.

Labradorite belongs to the feldspar group, which also includes moonstone. If you want to compare labradorite with other popular stones, you can also explore amethyst and obsidian.

Summary: key properties of labradorite

• Labradorite belongs to the feldspar group.
• Its hardness is about 6–6.5 on the Mohs scale.
• It forms as magma cools and crystallizes.
• Its most famous property is labradorescence, or play of colors.
• The colors arise from the interaction of light with the internal structure of the mineral.
• Finnish spectrolite is a striking variety of labradorite.

Frequently asked questions about labradorite

What is the hardness of labradorite?

The hardness of labradorite is generally about 6–6.5 on the Mohs scale.

Why does labradorite shimmer in different colors?

The play of colors, or labradorescence, occurs when light reflects off the internal structures of the mineral.

Is labradorite a mineral?

Yes. Labradorite is a mineral belonging to the feldspar group.

How does labradorite form?

Labradorite forms as magma cools and crystallizes in igneous rocks.

What is spectrolite?

Spectrolite is a variety of labradorite discovered in Finland, known for its particularly strong and multicolored shimmer.