Foitite

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Physical & Optical Properties

Mohs Hardness 7.0
Specific Gravity 3.17
Crystal System Hexagonal
Fracture Irregular
Color various
Pleochroism Strong: pale lavender - dark blue

Mohs Hardness

Mohs Hardness: 7.0
1 Soft10 Hard

Crystal System

a a c Hexagonal a = b ≠ c, α = β = 90°, γ = 120°

Value & Market

Price Tier Moderate ($50-500/ct)

About Foitite

Foitite is an iron-aluminum tourmaline end-member, typically presenting in dark blue to blue-black or nearly opaque tones with a vitreous to resinous luster. It was formally described in 1995 and named in honor of mineralogist Frank C. Foord, with primary occurrences in pegmatites in Portugal, Pakistan, and Afghanistan. Transparent facetable material is exceedingly rare, making cut foitite a significant collector piece.

Jewelry Use

Durability 7/10

Suitable for daily wear

Science FYI Family

Frequently Asked Questions

What is Foitite?
Foitite is an iron-aluminum tourmaline end-member, typically presenting in dark blue to blue-black or nearly opaque tones with a vitreous to resinous luster. It was formally described in 1995 and named in honor of mineralogist Frank C. Foord, with primary occurrences in pegmatites in Portugal, Pakis
What is the hardness of Foitite?
Foitite has a Mohs hardness of 7.0, making it excellent for use in jewelry.
What color is Foitite?
Foitite is primarily Various.
How much does Foitite cost?
Foitite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Foitite?
Foitite belongs to the Hexagonal crystal system.

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