Where is Labradorite found?
Labradorite (Plagioclase Feldspar)
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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 identified in 1770. Found in anorthosite intrusions.
Finland
Known for the high-quality, intensely iridescent variety called Spectrolite, found in anorthosite.
Madagascar
Significant deposits producing large quantities of gem-quality labradorite.
Norway
Found in various igneous and metamorphic complexes.
Russia
Occurrences in anorthosite bodies.
United States (Oregon, New York)
Oregon is known for Oregon Sunstone, a variety of labradorite/oligoclase with aventurescence. New York has anorthosite occurrences.
Australia
Found in some igneous rock formations.
Collecting tips
- Look in Mafic Igneous Rocks. Target areas with known occurrences of gabbro, basalt, or especially anorthosite, as these are the primary host rocks for labradorite.
- Observe for Labradorescence. Rotate samples under direct light (sunlight is best) to observe the characteristic iridescent flash of colors. This is the most definitive visual identifier.
- Check for Cleavage. Examine broken surfaces for two distinct cleavage planes intersecting at nearly right angles. This is a key characteristic of all feldspars.
- Consider Associated Minerals. Labradorite often occurs with pyroxenes (augite), olivine, and magnetite in mafic rocks.
- Safety Precautions. Labradorite itself is not hazardous. However, when collecting in the field, always wear appropriate safety gear (gloves, eye protection) and be aware of your surroundings, especially in quarries or rocky terrain. No specific warnings for hazardous materials are associated with labradorite.
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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