Fluorite, Blue

Fluorite is the mineral form of calcium fluoride, of the Halide family & has a hardness of 4 on the Mohs scale.  The name comes from Latin, meaning “to flow”, because fluorite is used as a flux agent in smelting. First written about in 1530, in 1852 it gave its name to the term Fluorescence & later to the element Fluorine.  Many types of fluorite glow under ultraviolet light, & some also exhibit thermoluminescence. Pure fluorine is clear, but impurities give it many different colors. It is used as lenses in telescopes & microscopes, as the main component in hydrofluoric acid manufacture & lapidary uses. Dubbed “The most colorful mineral in the world” Fluorite comes in all colors including white, clear & black. 

– Associated with the throat chakra, zodiac signs Cancer & Capricorn & vibrates to the numbers 2 & 11.

– Clears, dispels, cleanses, purifies, & reorganizes anything in the body not in perfect order; master organizer.

– Grounding, absorbs negative energy, cleanses aura/chakras.

– Anchors intuitive power & spiritual insights into the physical plane.

– Shields from psychic manipulation.

– Promotes concise communication skills, gentle honesty, sense of justice.

– Helps one let go of obsessions & frustrations.


Chemical Formula: CaF₂

Crystal System: isometric, hexoctahedral

Habit: well-formed coarse sized crystals; also nodular, botryoidal, rarely columnar or fibrous; granular, massive

Color: colorless, purple, lilac, golden-yellow, green, blue, pink, brown. 

Streak: white

Luster: vitreous

Transparency: transparent

Hardness: 4 Mohs (defining mineral)

Cleavage: octahedral, perfect on {111}, parting on {011}

Fracture: subconchoidal to uneven

Specific Gravity: 3-3.25 g/cm³

Refractive Index: 1.434

Michelle Ferris

Owner, curator, and buyer for Crystallography Gems. The brick and mortar shop is relatively new, and has been around since 2021 in Seattle's Georgetown neighborhood. Our presence as a business and as a rock and gem show has been longstanding, since 2013.Our shop offers crystals, minerals, gems, rocks, jewelry, and metaphysical tools. We work hard to inform our customers, giving them the education they need to be confident, intuitive, and wise collectors of crystals and minerals.