metamorphic
Green Greenstone / Celadonite-bearing Metamorphic Rock
Greenschist / Celadonite / Serpentinitic pebble
Hardness: 3-5 on Mohs scale depending on specific mineral makeup; Color: Pale mint green to yellowish-green with fine dark specks; Luster: Dull to waxy; Texture: Fine-grained, stream-rounded pebble.
- Hardness
- 3-5 on Mohs scale depending on specific mineral makeup
- Color
- Pale mint green to yellowish-green with fine dark specks
- Luster
- Dull to waxy
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Physical properties
Hardness: 3-5 on Mohs scale depending on specific mineral makeup; Color: Pale mint green to yellowish-green with fine dark specks; Luster: Dull to waxy; Texture: Fine-grained, stream-rounded pebble.
Formation & geological history
Formed through low-grade metamorphism or hydrothermal alteration of mafic volcanic rocks. Common in suture zones and ophiolite complexes, such as the Zagros suture zone in western Iran (35.0°N, 46.4°E).
Uses & applications
Used historically for carving, decorative stone, small ornamental items, or as stream-pebble lapidary material.
Geological facts
Rocks of this light green, fine-grained appearance are very typical of altered volcanic or ultramafic pebbles washed down from regional mountain belts like the Zagros system, where altered basaltic/ophiolitic fragments abound.
Field identification & locations
Identify by its light green hue, fine-grained microcrystalline texture, lack of quartz-like translucency, and soft-to-medium hardness. Common along riverbeds draining altered igneous terrain.
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