Labradorite

Here’s a detailed breakdown of labradorite, covering its chemical composition, colours, uses, mining locations, and the reason behind its signature flash:

Chemical Composition

Mineral Class: Feldspar (specifically, a plagioclase feldspar)

Formula: (Ca,Na)(Al,Si)₄O₈

A mix of calcium and sodium aluminium silicate

Part of the plagioclase series between albite (Na) and anorthite (Ca)

Colour & Appearance

Base colours: Grey, grey-black, dark greenish-grey

Flash colours (Labradorescence):

Electric blue

Green

Gold

Orange

Pink

Violet (rare)

Multicolour flashes (sometimes in "spectrolite")

Why Does Labradorite Flash?

The iridescent flash, called labradorescence, is caused by:

Light interference within microscopic, layered structures of different compositions inside the stone.

These layers reflect and scatter light at various angles, creating the play of colours.

The phenomenon is similar to soap bubbles or butterfly wings, but on a crystalline level.

Mining Locations

Labradorite is found worldwide, but notable sources include:

Labrador, Canada (where it was first discovered in 1770 — hence the name)

Finland (Spectrolite – very vibrant type of labradorite)

Mexico

Russia

Norway

USA (Oregon, Utah)

Madagascar (known for vibrant colours)

Uses

1. Metaphysical / Spiritual

Known as the Stone of Transformation

Said to enhance:

Intuition

Psychic abilities

Protection from negative energy

Creativity and self-discovery

Popular in crystal healing and energy work

2. Jewellery

Common in rings, pendants, earrings, often cabochon-cut to showcase labradorescence

Durable enough for daily wear (Mohs hardness: 6 – 6.5)

3. Decorative / Architectural

Used in countertops, tiles, and ornamental carvings

Labradorite slabs are polished to highlight their flash