Kde se vyskytuje Jade?
Nephrite or Jadeite
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Otevřít aplikaciJade se vyskytuje ve specifických geologických prostředích. Vědět, kde hledat a v jakém typu horniny, je rozdíl mezi návratem s prázdnou a nálezem skvělého vzorku.
Kde najít Jade
Myanmar (Burma)
Primary source of gem-quality jadeite, particularly the highly prized 'Imperial Jade'. Occurs in alluvial deposits and in situ within serpentinite bodies.
Canada (British Columbia)
Major source of nephrite jade, found in large boulders and in situ deposits associated with serpentinite.
Russia (Sayan Mountains)
Significant deposits of nephrite, often with attractive green colors.
China (Xinjiang, Liaoning)
Historical source of nephrite ('Hetian Jade'), found in alluvial deposits and primary occurrences.
Guatemala
Source of jadeite, including rare blue and black varieties, historically used by Mayan civilizations.
USA (Wyoming, California, Alaska)
Nephrite deposits are found in several states, often associated with ultramafic rocks.
New Zealand (South Island)
Known for its nephrite ('Pounamu' or 'Greenstone'), culturally significant to the Māori people. Found in riverbeds and glacial deposits.
Tipy pro sběr
- Look for specific geological settings. For nephrite, search in areas with serpentinite outcrops, altered ultramafic rocks, or dolomitic marbles. For jadeite, focus on high-pressure metamorphic terrains, often associated with serpentinite in subduction zones.
- Check riverbeds and alluvial deposits. Both nephrite and jadeite are extremely tough and resistant to weathering, so they can be found as rounded pebbles and boulders in riverbeds downstream from their primary sources.
- Perform a scratch test (carefully). Jadeite (Mohs 6.5-7) is harder than nephrite (Mohs 6-6.5). Neither should be easily scratched by a steel knife (Mohs 5.5). This can help differentiate from softer look-alikes like serpentine.
- Assess toughness, not just hardness. Jade's defining characteristic is its exceptional toughness due to its interlocking fibrous structure. It is very difficult to break, even with a hammer. This is a key differentiator from many brittle minerals.
- Observe translucency and luster. High-quality jade often exhibits a waxy to vitreous luster and can be translucent, especially in thinner sections. Serpentine, a common simulant, often has a more greasy or resinous luster and can be more opaque.
Rychlá kontrola
- Barva:
- Green, white, lavender, yellow, orange, black (variable)
- Lesk:
- Vitreous to greasy/waxy
- Vryp:
- White
Prozkoumat Jade
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