igneous
K2 Stone
Azurite in Granite
Mohs hardness of 6 to 7 for the granite matrix and 3.5 to 4 for the azurite spots; white, gray, and black speckled matrix with distinct vibrant blue spherical spots; vitreous to dull luster; massive crystal structure; uneven fracture.
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Physical properties
Mohs hardness of 6 to 7 for the granite matrix and 3.5 to 4 for the azurite spots; white, gray, and black speckled matrix with distinct vibrant blue spherical spots; vitreous to dull luster; massive crystal structure; uneven fracture.
Formation & geological history
Formed from the cooling and crystallization of magma into granite, with later hydrothermal fluids depositing azurite into the fractures and cavities of the granite.
Uses & applications
Used primarily in lapidary arts, making tumbled stones, cabochons for jewelry, and as a collector's specimen.
Geological facts
Despite being commonly referred to as K2 Jasper or K2 Granite, it is technically a granite containing azurite, which is a rare combination since azurite typically forms in copper-rich sedimentary or metamorphic environments rather than intrusive igneous rocks.
Field identification & locations
Found almost exclusively near the base of Mount K2 in the Karakoram range in Pakistan. Easily identified by the contrasting bright blue spots against a white and gray granitic background.
