About Actinolite

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Keep reading to discover more about actinolite

  • Mineralogy and geology*
  • Metaphysical, Spiritual and Healing** Properties***
  • Common Associations


Mineral formula: Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22OH2

Mineral Group: actinolite group, amphibole supergroup

Crystal system: Monoclinic

Crystal habit: Actinolite rarely forms good crystals. It is most frequently found as radiating fibrous to asbestiform masses. It may also occur as bladed crystals to 15 cm; columnar, Crystals are may be kinked or bent. 

Cleavage: Distinct / good on {110}

Fracture: splintery

Color: green, green-black, gray-green, or black

Luster: vitreous, silky

Diaphaneity: transparent to translucent

Moh’s scale hardness: 5 – 6

Streak: White

Specific gravity: 3.03 – 3.24

Named after:  the Greek ακτίνα ("aktina") for "ray" and λίθος ("lithos") in 1794 by Richard Kirwan for "stone" in allusion to the fibrous nature of the original specimens. 

Geological occurrence: Produced by low-grade regional or contact metamorphism of magnesium carbonate, mafic, or ultramafic rocks; also in glaucophane-bearing blueschists. 


Spiritual, Metaphysical and Healing Properties

Melody*** describes actinolite as an immensely important tool for spiritual, metaphysical and healing work. Especially when used with sheen obsidian, it expands the energy bodies to provide a most effective shield. It provides a connection to the "all that is" thus facilitating feelings of brotherhood. Used with focused intent it can help to strengthen wanted conditions or weaken unwanted conditions.


 Common Associations

  • Chakra – heart (based on green color)
  • Numerology - vibrates to the number 9
  • Zodiac – Scorpio
  • Birthstone – no traditional, but it is often a component of green nephrite jade
  • Wedding Anniversary – no traditional, except for jade (35th)


* Mineralogical information is from mindat.org

** Always consult with your medical professional for any physical or long-term healing issues.

*** Metaphysical properties come from: 

Love Is in the Earth (1995) Melody, Earth-Love Publishing House, 726 pp.

The Crystal Bible, A Definitive Guide to Crystals (2003) Judy Hall, Walking Stick Press, 399 pp.

Crystal Muse (2017) Heather Askinosie and Timmi Jandro, Hay House, 285 pp.

Crystal Gridwork (2018) Kiera Fogg, Weiser Books, 128 pp.