Mcgillite
A variety of Minerals
What is Mcgillite?
Mcgillite is a rare, monoclinic, pseudohexagonal mineral of the Pyrosmalite group, with the formula Mn2+8Si6O15(OH)8Cl2. It was first approved in 1979, and is named for McGill University. Mcgillite is found in the Sullivan Mine, Kimberley, Kootenay district, British Columbia, Canada; the Kyurazawa mine, Tochigi Prefecture, Japan; and at one location in Romania. At the Sullivan mine, it forms as fracture fillings in a manganese-rich portion of quartzite and argillite within a metamorphosed lead-zinc deposit. It is pink in color.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Mcgillite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Mcgillite Localities Map
See where Mcgillite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Hardness (Mohs)
- 5
Chemical Properties
- Chemical Formula
- (Mn,Fe)8Si6O15(OH)8Cl2
- Elements
- Cl, H, Mn, O, Si
Identify Mcgillite Instantly
- Snap a photo, get instant results
- 6,700+ rocks, minerals & crystals
- Discover collecting spots near you
Mcgillite FAQs
How do I identify Mcgillite?
Mcgillite can be identified by its hardness of 5 on the Mohs scale. Look for these key characteristics when examining specimens.
How hard is Mcgillite?
Mcgillite has a hardness of 5 on the Mohs scale. This gives it moderate hardness.
%252FAbenakiite-(ce)-01.jpg&size=small)
