Where is Labradorite found?
Labradorite (a plagioclase feldspar mineral)
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Open the appLabradorite occurs in specific geological environments. Knowing where to look, and in what kind of rock, is the difference between going home empty-handed and finding a great specimen.
Where to find Labradorite
Labrador, Canada
The type locality, where it was first discovered in 1770. Produces high-quality material.
Finland
Known for producing 'Spectrolite,' a variety of labradorite with a particularly broad and intense spectrum of colors.
Norway
Significant deposits, often associated with anorthosite intrusions.
Madagascar
Produces large quantities of gem-quality labradorite.
Russia
Found in various regions, including the Kola Peninsula.
United States
Occurrences in states like Oregon (often as sunstone, a variety of labradorite/oligoclase), New York, and Arizona.
Australia
Deposits found in various igneous rock formations.
Collecting tips
- Look in Mafic Igneous Rocks. Search for labradorite in outcrops of gabbro, basalt, anorthosite, and norite. These dark-colored rocks are its primary hosts.
- Observe for Labradorescence. Rotate potential samples under natural light. The characteristic iridescent flash of colors is the most definitive identifier. This effect is often best seen on freshly broken surfaces or polished faces.
- Check Cleavage. Examine broken surfaces for two distinct cleavage planes intersecting at nearly 90 degrees. This is typical for plagioclase feldspars.
- Consider Associated Minerals. Labradorite often occurs with pyroxenes (augite), olivine, and magnetite in mafic rocks.
Quick Check
- Color:
- Gray to dark gray with iridescent flashes of blue, green, yellow, etc.
- Luster:
- Vitreous to pearly
- Streak:
- White
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