About Franklinite

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Keep reading to discover more about franklinite

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

Mineralogy and Geology of Franklinite

Mineral formula: Zn2+Fe3+2O4

Grouping: member of the Spinel Supergroup

Crystal system: isometric

Crystal habit: Octahedral crystals common; dodecahedral less common; cubic rare.

Cleavage: none observed

Fracture: irregular, uneven, conchoidal

Color: black

Streak: reddish brown to black

Luster: metallic, sub-metallic

Diaphaneity: opaque

Moh’s scale hardness: 5 ½ - 6

Specific gravity: 5.07 – 5.22

Named after: its type locality of Franklin Furnace (now Franklin Borough), New Jersey, in 1819 by Pierre Berthier

Type locality: Franklin Furnace, New Jersey

Geological occurrence: High temperature metamorphism of Fe, Zn, Mn-rich marine carbonates.

Spiritual, Metaphysical and Healing Properties

Franklinite is an excellent stone for grounding and centering. It has been used to stimulate inventiveness and self-expression.

Common Associations

  • Chakra – base (root)
  • Numerology - vibrates to the number 2
  • Zodiac – Gemini
  • Birthstone – none traditional
  • Wedding Anniversary – none traditional

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* 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.