Fluor-buergerite
A variety of Tourmaline Group
What is Fluor-buergerite?
Fluor-buergerite, originally named buergerite, is a mineral species belonging to the tourmaline group. It was first described for an occurrence in rhyolitic cavities near Mexquitic, San Luis Potosi, Mexico. It was approved as a mineral in 1966 by the IMA and named in honor of Martin J. Buerger (1903–1986), professor of mineralogy at the Massachusetts Institute of Technology. It has also been reported from Minas Gerais, Brazil, and the Central Bohemia Region of the Czech Republic.
Optical Properties
- Pleochroism
- Yellow-brown, very pale yellow
- Optical Character
- Uniaxial negative
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Fluor-buergerite 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.
Fluor-buergerite Localities Map
See where Fluor-buergerite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Bronzish-brown to dark-brown
- Hardness (Mohs)
- 7
- Density
- 3.311 g/cm³
- Streak
- Brown
Chemical Properties
- Chemical Formula
- Na(Fe3+3)Al6(Si6O18)(BO3)3O3F
- Elements
- Al, B, F, Fe, Na, O, Si
Identify Fluor-buergerite Instantly
- Snap a photo, get instant results
- 6,700+ rocks, minerals & crystals
- Discover collecting spots near you
Fluor-buergerite FAQs
How do I identify Fluor-buergerite?
Fluor-buergerite can be identified by its hardness of 7 on the Mohs scale, Bronzish-brown to dark-brown color. Look for these key characteristics when examining specimens.
What color is Fluor-buergerite?
Fluor-buergerite typically appears in Bronzish-brown to dark-brown. Color can vary depending on impurities and formation conditions.
How hard is Fluor-buergerite?
Fluor-buergerite has a hardness of 7 on the Mohs scale. This makes it a relatively hard mineral suitable for jewelry.
