igneous
K2 Jasper (K2 Granite)
Azurite in Granite (Al2Cu3(CO3)2(OH)2 in NaAlSi3O8)
Hardness: 6 (granite host) to 3.5-4 (azurite spots); Color: White/grey base with vibrant blue spots; Luster: Dull to vitreous; Crystal structure: Monoclinic (azurite) within a phaneritic igneous matrix; Specific Gravity: 2.6-2.7
- Hardness
- 6 (granite host) to 3
- Color
- White/grey base with vibrant blue spots
- Luster
- Dull to vitreous
Identified More igneous →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6 (granite host) to 3.5-4 (azurite spots); Color: White/grey base with vibrant blue spots; Luster: Dull to vitreous; Crystal structure: Monoclinic (azurite) within a phaneritic igneous matrix; Specific Gravity: 2.6-2.7
Formation & geological history
Formed through the secondary mineralization of azurite within a solidified granite matrix. It is found exclusively at the base of the K2 mountain in the Karakoram Range, Pakistan, under extreme high-altitude conditions.
Uses & applications
Primarily used as a semi-precious gemstone for jewelry (cabochons, beads), decorative carvings, and as a popular specimen for metaphysical and mineral collectors.
Geological facts
Despite being called 'K2 Jasper,' it is technically a granite, not a jasper. It is famous for containing azurite, a copper carbonate mineral that rarely occurs within a granite host, making it a geological rarity.
Field identification & locations
Identify in the field by looking for the distinct 'ink blot' blue spots of azurite on a white/grey diorite or granite background. Found only in Northern Pakistan. Collectors should check for the presence of biotite (black specks) which confirms the granite host.
