Guide
Actinolite specimens for sale
22 for sale · $15–$7,500 USD
47 in the gallery
Actinolite is a monoclinic amphibole mineral that forms in elongated, slender crystals and fibrous masses. It commonly exhibits a green color range from pale to dark, with a vitreous to silky lustre and a characteristic bladed or needle-like habit in some specimens. The mineral often occurs in contact metamorphic rocks and hydrothermal environments, where it can form as part of actinolite-tass taught assemblages within hornfels and greenschist facies rocks.
- Formula
- Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
- Rarity
- Common
- Stability
- Stable
- Collector interest
- Moderate Interest
- Classification notes
- Inosilicate, Amphibole group; member of the actinolite-tremolite series
Buy Actinolite specimens
View all 22Where Actinolite is found
Top localities
- Dodoma Region19 specimens
- Tormiq Valley4 specimens
- Calumet & Hecla Mine3 specimens
- Knappenwand3 specimens
- Bouismas2 specimens
- Kongwa2 specimens
- Tilly Foster Iron Mine2 specimens
- Afghanistan1 specimen
- Indonesia1 specimen
- Brumado1 specimen
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About Actinolite
Notable specimens come from producing localities in Pakistan, Tanzania, Austria, the United States, and Namibia. Collectors value actinolite for its color variety and the texture of stony to fibrous aggregates, which can create striking visual contrasts when cut or sliced for display. Larger, well-formed crystals and concentrated fibrous masses are particularly sought after for their mineralogical interest and aesthetic appeal.
