Hübnerite

Big Photo

Peru
12.65 carats
© raregemhunter

Hübnerite is named after Hüttenmeister Adolph Hübner, German mining engineer and metallurgist at Freiberg, Saxony.

Hübnerite forms transparent to translucent prismatic yellowish brown to reddish brown crystals. The crystals are typically flattened and occur with fine striations in the direction of elongation.

Deep blood-red internal reflections combined with the metallic-adamantine-resinous lustre make this gem very attractive.

Hübnerite Gemstones by Colour

This table shows the variety of hues this gemstone can be found in. Click on a photo for more information.
 
 

Hübnerite Gemstones by Size

This table shows distribution of Hübnerite gemstone sizes that are listed on this site. This can give a good indication as to the general availability of this gemstone in different sizes.
Contributed photos
Lightest:0.98 cts
Heaviest:12.65 cts
Average:5.67 cts
Total photos:3
Do you have a larger Hübnerite? Why not upload a photo?
0.98ct to 2.15ct2.15ct to 3.31ct3.31ct to 4.48ct4.48ct to 5.65ct5.65ct to 6.82ct6.82ct to 7.98ct7.98ct to 9.15ct9.15ct to 10.32ct10.32ct to 11.48ct11.48ct to 12.65ct
General Information
Other Names/Trade Names:
Chemical Formula
Mn
2+
 
WO
 
4
Michael O’Donoghue, Gems, Sixth Edition (2006)
Photos of natural/un-cut material from mindat.org
Physical Properties of Hübnerite
Mohs Hardness4 to 4.5
Michael O’Donoghue, Gems, Sixth Edition (2006)
Specific Gravity7.12 to 7.18
Michael O’Donoghue, Gems, Sixth Edition (2006)
TenacityBrittle
Anthony et al, Handbook of mineralogy (2001)
Cleavage QualityPerfect
Michael O’Donoghue, Gems, Sixth Edition (2006)
FractureUneven
Anthony et al, Handbook of mineralogy (2001)
Optical Properties of Hübnerite
Refractive Index2.17 to 2.32
Michael O’Donoghue, Gems, Sixth Edition (2006) The RI for the alpha, beta and gamma rays is 2.17–2.20, 2.22 and 2.30–2.32
Optical CharacterBiaxial/+
Michael O’Donoghue, Gems, Sixth Edition (2006)
Birefringence0.13
Michael O’Donoghue, Gems, Sixth Edition (2006)
PleochroismPerceptible: yellow to green, red-orange - yellowish brown to greenish yellow, red-orange to red - green; brick-red to red
Anthony et al, Handbook of mineralogy (2001)
Colour
Colour (General)Yellowish brown to reddish brown
Michael O’Donoghue, Gems, Sixth Edition (2006)
More from other references
TransparencyTransparent,Translucent
Michael O’Donoghue, Gems, Sixth Edition (2006)
LustreAdamantine,Resinous,Metallic
Michael O’Donoghue, Gems, Sixth Edition (2006)
Crystallography of Hübnerite
Crystal SystemMonoclinic
Michael O’Donoghue, Gems, Sixth Edition (2006)
HabitPrismatic
Michael O’Donoghue, Gems, Sixth Edition (2006)
More from other references
Geological Environment
Where found:Typical of high-temperature hydrothermal vein deposits and pneumatolytically altered granites yielding greisen; in granite pegmatites; also in alluvial and eluvial deposits.
Anthony et al, Handbook of mineralogy (2001)
Further Information
Mineral information:Hübnerite information at mindat.org
Significant Gem Localities
Peru
 
  • Áncash
    • Pallasca Province
      • Pampas District
Copyright © Jolyon & Katya Ralph 1993-2019. Site Map. Locality, gem & photograph data are the copyright of the individuals who submitted them. For more information please contact the . Gemdat.org is an online information resource dedicated to providing free gemmological information to all.