Labradorite is found on every inhabited continent, but the most significant deposits come from Canada, Madagascar, Finland, and the United States. The mineral was first discovered in the 1700s along the coast of Labrador in northeastern Canada, and that region remains one of the most iconic sources today. Since then, commercially important deposits have been identified across the globe, each producing stones with slightly different character.
The Original Discovery in Labrador, Canada
Labradorite gets its name from the Labrador region of Newfoundland and Labrador, Canada, where it was first identified in the 1700s near the town of Nain. The area is still actively quarried, with Tabor Island (about 15 km south of Nain) serving as a primary extraction site. The Nain deposits are known for extremely coarse-grained crystals packed into pegmatitic pods, meaning the individual crystals grew large within slow-cooling pockets of igneous rock. These big, tightly packed crystals are what produce the vivid flashes of blue and green that made the mineral famous.
Additional occurrences have been found further north of Davis Inlet in Labrador, though these tend to be medium- to coarse-grained crystals within fractured rock zones rather than the massive pegmatitic pods found near Nain.
Madagascar: A Major Commercial Source
Madagascar is one of the largest suppliers of labradorite on the global market, particularly for polished specimens and cabochons sold to collectors and jewelers. The Ampanihy District in the Atsimo-Andrefana region of southwestern Madagascar hosts multiple named quarries dedicated to labradorite extraction, including the Antsohamamy, Norcross, and Benonoky quarries. Malagasy labradorite often displays rich blue, gold, and multicolor flashes, and its relative abundance keeps prices accessible for the gem and mineral trade.
Finland’s Spectrolite
Finland produces a particularly prized variety of labradorite called spectrolite, found almost exclusively in a small area of the Lappeenranta Highlands in South Karelia, southeastern Finland. While ordinary labradorite typically flashes blue or green, spectrolite displays the full visible spectrum: reds, oranges, purples, and greens all appearing across a single stone. That’s how it got its name. Finnish jeweler Walter Mikkola coined the term “spektroliitti” to capture this full-spectrum iridescence.
The discovery itself was an accident. In 1940, geologist Pekka Laitakari found the mineral near the village of Tevalainen in Ylämaa while workers were blasting rock to build anti-tank barriers during World War II. Spectrolite remains geographically limited to that condensed area of South Karelia, with only tiny scattered pockets found elsewhere in Finland. This scarcity, combined with its color range, makes Finnish spectrolite considerably more valuable than standard labradorite.
United States: Oregon Sunstone and Utah Deposits
The United States has two notable labradorite-producing regions. Oregon Sunstone, the state’s official gemstone, is a transparent to translucent variety of labradorite mined in the high desert of south-central Oregon. Lake County’s Plush area hosts well-known mines like the Dust Devil Mine and Spectrum Mine, while Harney County contributes production from the Ponderosa Sunstones Mine and Sunstone Butte Mine. Oregon Sunstone can contain tiny copper platelets that give some specimens a red or green body color alongside their characteristic shimmer. Some of these mines are open to the public for fee-based collecting.
In Utah, Sunstone Knoll in Millard County produces labradorite crystals, though on a smaller scale. These tend to be lighter in color and are popular with hobby collectors.
India, Norway, Russia, and Other Sources
India is a significant source of white labradorite, which is widely sold in the gem trade as “rainbow moonstone.” Despite the moonstone label, this stone is mineralogically labradorite, not true moonstone. It has a pale, translucent body with flashes of blue, and India supplies a large portion of the polished cabochons and carved pieces on the market.
Smaller but documented labradorite deposits exist across Norway, Russia (particularly Siberia), Australia, Mexico, and parts of Africa including Zimbabwe. Norway has historically produced specimens valued for their optical quality, while Russian deposits are spread across large igneous formations in the country’s interior.
Why Labradorite Forms Where It Does
Labradorite is a member of the plagioclase feldspar family, a group of minerals that crystallizes within cooling magma. It forms in calcium-rich igneous rocks, particularly in a rock type called anorthosite, which is composed almost entirely of plagioclase feldspar. The large igneous complexes near Nain, the ancient rock formations in Finland, and the volcanic basalts of Oregon all provided the right chemistry for labradorite to crystallize.
The mineral’s signature optical effect, called labradorescence, comes from its internal structure rather than surface color. As the rock cools, slightly different compositions of feldspar separate into alternating microscopic layers. According to research from the Gemological Institute of America, these layers consist of calcium-rich bands roughly 70 to 200 nanometers wide alternating with sodium-rich bands about 50 to 100 nanometers wide. When light enters the stone, it bounces between these layers and interferes with itself, producing the characteristic flash of color. The thickness of the layers determines which colors you see: thinner layers produce blues, while thicker or more varied layers create the full-spectrum effect seen in Finnish spectrolite.
Labradorite rates 6 to 6.5 on the Mohs hardness scale, making it durable enough for jewelry but softer than quartz. It cleaves easily along flat planes, which is why most gem-quality labradorite is cut as smooth cabochons or polished freeforms rather than faceted stones. Oregon Sunstone is the main exception, as its transparency allows faceted cuts that show off both its body color and internal shimmer.