Bayerite
A variety of Minerals
What is Bayerite?
Gibbsite, Al(OH)3, is one of the mineral forms of aluminium hydroxide. It is often designated as γ-Al(OH)3 (but sometimes as α-Al(OH)3.). It is also sometimes called hydrargillite (or hydrargyllite). Gibbsite is an important ore of aluminium in that it is one of three main phases that make up the rock bauxite. Gibbsite has three named structural polymorphs or polytypes: bayerite (designated often as α-Al(OH)3, but sometimes as β-Al(OH)3), doyleite, and nordstrandite. Gibbsite can be monoclinic or triclinic, while bayerite is monoclinic. Doyleite and nordstrandite are triclinic forms.
Etymology & Origins
Gibbsite is named after George Gibbs (1776–1833), an American mineral collector.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Bayerite 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.
Bayerite Localities Map
See where Bayerite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- White
- Density
- 2.54 g/cm³
Chemical Properties
- Chemical Formula
- Al(OH)3
- Elements
- Al, H, O
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Bayerite FAQs
How do I identify Bayerite?
Bayerite can be identified by its White color. Look for these key characteristics when examining specimens.
What color is Bayerite?
Bayerite typically appears in White. Color can vary depending on impurities and formation conditions.
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