Where is Jadeite found?
NaAlSi2O6
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Open the appJadeite 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 Jadeite
Myanmar (Burma)
The primary source of gem-quality jadeite, particularly the highly prized 'Imperial Jade'. Found in alluvial deposits and in situ in serpentinite-associated rocks in the Kachin State.
Guatemala
Historically significant source, rediscovered in the late 20th century. Found in metamorphic rocks associated with ancient subduction zones.
Japan
Occurs in Itoigawa, Niigata Prefecture, associated with serpentinite and blueschist facies rocks.
Russia
Found in the Polar Urals and other regions, often associated with ophiolite complexes.
California, USA
Occurs in various localities, including Clear Creek and New Idria, San Benito County, typically in serpentinite-rich environments.
Collecting tips
- Geological Context. Focus searches in areas known for high-pressure, low-temperature metamorphic rocks, especially blueschist facies terrains and serpentinite mélanges, which are characteristic of ancient or active subduction zones.
- Associated Minerals. Look for jadeite in association with other minerals indicative of its formation environment, such as glaucophane, lawsonite, omphacite, albite, and serpentine minerals.
- Density Test. Jadeite has a relatively high specific gravity (3.30-3.38). This can be a useful field test to distinguish it from lighter look-alikes like serpentine or quartz.
- Toughness. Jadeite is exceptionally tough, meaning it resists breaking and chipping. This can be observed when attempting to break or scratch a specimen (though this should be done carefully to avoid damaging valuable samples).
- Color and Luster. While color is variable, the characteristic vitreous to greasy luster and often mottled appearance can be good indicators. Translucency is a key feature of gem-quality material.
Quick Check
- Color:
- Green, white, lavender, blue, pink, brown, red, orange, black (often mottled)
- Luster:
- Vitreous to greasy
- Streak:
- White
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