Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Forsterite from
Puy de Ténuzet quarry, Saint-Ours-les-Roches, Riom, Puy-de-Dôme, Auvergne-Rhône-Alpes, France


00432200017272025158643.jpg
Forsterite, etc.

Puy de Ténuzet quarry, Saint-Ours-les-Roches, Riom, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
03086470017271984608319.jpg
Forsterite, etc.

Puy de Ténuzet quarry, Saint-Ours-les-Roches, Riom, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
00540180017271984569879.jpg
Forsterite, etc.

Puy de Ténuzet quarry, Saint-Ours-les-Roches, Riom, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
00432200017272025158643.jpg
Forsterite, etc.

Puy de Ténuzet quarry, Saint-Ours-les-Roches, Riom, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
03031870017272025208186.jpg
Forsterite, etc.

Puy de Ténuzet quarry, Saint-Ours-les-Roches, Riom, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
04650830017272025182213.jpg
Forsterite, etc.

Puy de Ténuzet quarry, Saint-Ours-les-Roches, Riom, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
00432200017272025158643.jpg
Forsterite, etc.

Puy de Ténuzet quarry, Saint-Ours-les-Roches, Riom, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
03086470017271984608319.jpg
Forsterite, etc.

Puy de Ténuzet quarry, Saint-Ours-les-Roches, Riom, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
00540180017271984569879.jpg
Forsterite, etc.

Puy de Ténuzet quarry, Saint-Ours-les-Roches, Riom, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
Locality type:Quarry
Classification
Species:Forsterite
Formula:Mg2(SiO4)
Comments:All olivines at Tunisset have > 50 % forsterite component.
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Hematite3
Magnetite1
Pseudobrookite1
Data
Mineral Data:Click here to view Forsterite data
Locality Data:Click here to view Puy de Ténuzet quarry, Saint-Ours-les-Roches, Riom, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
Photo GalleryView Gallery (3 photos)
Data Identifiers
Mindat Occurrence Record ID:646252
Long-form Identifier:1:3:646252:9
GUID (UUID V4):0
Nearest other occurrences of Forsterite
5.1km (3.2 miles) ⓘPuy Gonnard, Beaunit, Charbonnières-les-Varennes, Riom, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
37.9km (23.5 miles) ⓘRoca-Neyra, Perrier, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
50.5km (31.4 miles) ⓘMontboissier quarry, Brousse, Ambert, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
67.0km (41.6 miles) ⓘAllevier, Azérat, Brioude, Haute-Loire, Auvergne-Rhône-Alpes, France
69.3km (43.1 miles) ⓘChampagnac-le-Vieux, Champagnac-le-Vieux, Brioude, Haute-Loire, Auvergne-Rhône-Alpes, France
71.2km (44.3 miles) ⓘMaillargues, Allanche, Saint-Flour, Cantal, Auvergne-Rhône-Alpes, France
References
Médard P. et al. (2009) La pseudobrookite du Puy de Tunisset (Puy-de-Dôme). Le Cahier des Micromonteurs 105: 3-11.
 
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