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

Identified March 14, 2026More igneous →

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Physical properties

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.

Other igneous specimens

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Blue Apatite

Fluorapatite (Ca5(PO4)3F)

mineral

Dark Igneous Rock (Likely Basalt or Diabase)

Basalt (extrusive igneous rock) or Diabase (intrusive igneous rock - also known as Dolerite), largely composed of plagioclase feldspar, pyroxene (augite), and sometimes olivine and amphibole. Exact mineralogy would require thin section analysis.

Igneous

Magnetite

Iron(II,III) oxide (Fe3O4)

mineral

Blue Apatite

Apatite (Group), Ca5(PO4)3(F,Cl,OH)

mineral

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

mineral

Magnetite

Magnetite (Fe3O4)

mineral