metamorphic
Eclogite
Eclogite (composed primarily of Omphacite and Garnet)
Hardness: 6-7.5 (Mohs scale), Color: Pink-to-red garnet and green pyroxene, Luster: Vitreous to dull, Crystal structure: Granular/Course, Specific Gravity: 3.2-3.6
- Hardness
- 6-7
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Physical properties
Hardness: 6-7.5 (Mohs scale), Color: Pink-to-red garnet and green pyroxene, Luster: Vitreous to dull, Crystal structure: Granular/Course, Specific Gravity: 3.2-3.6
Formation & geological history
Formed under extreme high pressure and temperature conditions in the mantle or subduction zones, representing the highest grade of regional metamorphism.
Uses & applications
Used for geological study of the Earth's interior and mantle processes. Occasionally used as a minor abrasive or for ornamental stone pieces.
Geological facts
Known as 'Christmas Rock' due to its distinct red and green coloration; it is one of the densest rocks in the Earth's crust.
Field identification & locations
Identify by looking for pinkish garnet crystals embedded in a dense, dark or greenish matrix. Found in subduction-related metamorphic belts or as nodules in kimberlite pipes.
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