igneous
Presumed K2 granite (K2 stone)
K2 granite, an altered granitic rock composed mainly of quartz, feldspar, and white mica, with blue azurite spots
AI-generated identification · may be incorrectThe specimen appears pale greenish-white with dark mottling and blue-green areas; identification from this photo is uncertain. Granite minerals are typically Mohs 6–7, with a granular crystalline texture and no prominent cleavage in the rock as a whole.
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Physical properties
The specimen appears pale greenish-white with dark mottling and blue-green areas; identification from this photo is uncertain. Granite minerals are typically Mohs 6–7, with a granular crystalline texture and no prominent cleavage in the rock as a whole.
Formation & geological history
Granite forms when silica-rich magma cools slowly underground; K2 stone is reported from the Karakoram near K2 and has been altered by later mineral-bearing fluids. The age and exact alteration history cannot be determined from the image.
Uses & applications
Polished K2 stone is sold as a decorative and collectible lapidary material, including beads and cabochons.
Geological facts
Authentic K2 stone is known for bright blue azurite spots on a pale granite matrix; the pictured greenish appearance makes confirmation difficult.
Field identification & locations
Check for a hard, grainy quartz-feldspar matrix and distinct blue azurite spots; compare with a reliable mineral reference, as similar-looking altered rocks are common. Reported sources are in Pakistan’s Karakoram region.
