igneous
K2 Stone (or K2 Jasper)
Azurite-in-Granite (Potassium Feldspar, Quartz, Plagioclase, Muscovite, and Azurite)
Hardness: 6-7 (Granite matrix) / 3.5-4 (Azurite spots); Color: Grey/white mottled background with bright blue circular spots; Luster: Vitreous to dull; Crystal structure: Monoclinic (Azurite inclusions); Specific Gravity: ~2.65
- Hardness
- 6-7 (Granite matrix) / 3
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 (Granite matrix) / 3.5-4 (Azurite spots); Color: Grey/white mottled background with bright blue circular spots; Luster: Vitreous to dull; Crystal structure: Monoclinic (Azurite inclusions); Specific Gravity: ~2.65
Formation & geological history
Formed through the secondary mineralization of azurite droplets within a cooling granitic pluton. It is extremely rare and only found in the base of the K2 mountain in Pakistan.
Uses & applications
Primarily used for lapidary work, jewelry (beads, cabochons), and as a popular specimen for crystal collectors and metaphysical practitioners.
Geological facts
Despite being called 'K2 Jasper,' it is actually a granite, not a jasper. The bright blue spots are high-quality azurite that stayed distinct during the granite's formation.
Field identification & locations
Identified by the distinct 'ink-blat' blue azurite circles against a coarse grey salt-and-pepper granite background. Rarely mimics any other natural stone, though dyed or synthetic versions exist.
