Actinolite

specimen number:
2063540

location:
Kragero, Telemark, Norway

description:
Choice example for the species, this is a loose lustrous deep green striated double terminated crystal of actinolite, each termination hosting acicular crystallized actinolite. Complete all around and in great condition.

Situated along the coast of Telemark within the Mesoproterozoic Bamble Sector of the Baltic Shield, Kragero is world-renowned for its complex metamorphic geology, dominated by amphibolites, pegmatites, quartzites, and unique titanium-bearing intrusive rocks known locally as krageroidite. Beginning in the late nineteenth and early twentieth centuries, intensive commercial mining operations targeted these igneous and metamorphic formations to extract high-grade deposits of rutile, ilmenite, apatite, quartz, and nickel. These rich geological structures, particularly the pegmatite veins and intrusive bodies at classical historic sites such as Lindvikskollen, produced exceptional cabinet-quality specimens of deep-red rutile crystals, black tourmaline, lustrous ilmenite, albite, and large hornblende crystals. Today, while large-scale mining activity has ceased, the historic quarry dumps and outcrops across the archipelago remain a celebrated landmark for mineralogists and field collectors worldwide.

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