Hollandite is a manganese and barium oxide.
Due to its often radial, fibrous structure, it forms very aesthetic shapes in quartz.
For more information on Hollandite mineralogy, see Mindat.org->
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Hollandite
- Translations : Hollandit, Hollandita, Голландит, 锰钡矿
- Etymology : The name is dedicated to T.H. HOLLAND, Director of the Geological Service of India.
- Discovery: 1906 by Fermor
- Type localityKAJLIDONGRI, ETAT DE JHABUA (Inde).
Gemological data
- Chemical formula : Ba (Mn+4,Mn+2)8 O16
- Hardness (Mohs) : 4 - 6
- Density : 4.95
- Refractive index : 2.10 - 2.26
- Crystal system : Monoclinic
- Group : Coronadite
The gallery
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- Quartz – Hollandite
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- QUHO0002
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- QUHO0003
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- QUHO0004
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- QUHO0005
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- QUHO0006
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- QUHO0007
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- QUHO0008
