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Hibschite : Ca3Al2[(OH)6-1|(SiO4)1.5-2.5], Fluorite : CaF2 | |
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Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada Octrahedral hibschite crystal with fluorite. Photographed by and in the collection of Doug Merson. |
| © 2005 DM | Photo ID: 31900 View Count: 425 |
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Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada FOV 4.6 x 5.0 mm. Modris B coll (May 2000). Hibschite is fairly rare at MSH but this blast produced many xls of exceptional size. The xl shows the characteristic "stepped" growth pattern and penetration twinning. It was associated with relatively abundant UK39 (hellandite grp - formerly called tadzhikite-(Ce). The coating is ubiquitous at MSH and ... Mindat.org Photo of the Day - 13th Aug 2008 |
| Photo ID: 173050 View Count: 405 | |
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Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada FOV ~ 4.5 cm wide. Found April 2000. The largest hibschite xls are the two top leftmost xls in the "mouth" - just below the pectolite "teeth". Small fluorite cubes can barely be seen on the far left xl and there others scattered about in the vicinity. The xls in the center - just below the hibschite - are pectolite. The large xl on the rhs ... |
| Photo ID: 173174 View Count: 131 | |
Hibschite : Ca3Al2[(OH)6-1|(SiO4)1.5-2.5], Pectolite : NaCa2[HSi3O9] | |
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Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada FOV 3.1 x 2.3 mm. Collected by Modris B. June 1997. The hibschite xls are the two rounded octahedrons. These small xls show only a hint of the "stepped" growth characteristic of MSH hibschite. In my experience such small xls are not really rare but can be easily overlooked. The clear pectolite prisms are perfect - except for the unruly ... |
| Photo ID: 173305 View Count: 96 | |
Hibschite : Ca3Al2[(OH)6-1|(SiO4)1.5-2.5] | |
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Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada FOV 4.7 x 4.5 mm. Collecte by Modris B April 2000. This shows the characteristic "stepped" growth very clearly. |
| Photo ID: 173173 View Count: 78 | |
Hibschite : Ca3Al2[(OH)6-1|(SiO4)1.5-2.5], Fluorite : CaF2 | |
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Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada FOV 4.4 x 5.5 mm. Collected by Modris B. Anotherfairly large example from the April 2000 blast. The tiny fluorite cubes range from nearly colorless to deep purple. |
| Photo ID: 173172 View Count: 72 | |
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Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada FOV 9.3 x 8.4 mm. Collected by Modris B. June 1997. XRD shows that the dodecahedrons are "garnet group". Based on the appearance and environment they are almost certainly hibschite despite the somewhat unusual habit (for hibschite). They are also quite large for the species at MSH. The clear prisms with partly fibrous terminations are ... |
| Photo ID: 194329 View Count: 63 | |
Hibschite : Ca3Al2[(OH)6-1|(SiO4)1.5-2.5] | |
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Mariánská Skála (Mariánská hora; Marienberg), Ústí nad Labem (Aussig), Ústí Region, Bohemia (Böhmen; Boehmen), Czech Republic Crystal size 0,8mm |
| © Petr Fuchs | Photo ID: 59862 View Count: 246 |
Hibschite : Ca3Al2[(OH)6-1|(SiO4)1.5-2.5] | |
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Mariánská Skála (Mariánská hora; Marienberg), Ústí nad Labem (Aussig), Ústí Region, Bohemia (Böhmen; Boehmen), Czech Republic Crystal size 0,6mm |
| © Petr Fuchs | Photo ID: 59863 View Count: 194 |
Hibschite : Ca3Al2[(OH)6-1|(SiO4)1.5-2.5] | |
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Mariánská Skála (Mariánská hora; Marienberg), Ústí nad Labem (Aussig), Ústí Region, Bohemia (Böhmen; Boehmen), Czech Republic Crystal size 0,6mm |
| © Petr Fuchs | Photo ID: 59864 View Count: 192 |
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