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Ladjuar Medam (Lajur Madan; Lapis-lazuli Mine), Sar-e-Sang District, Koksha Valley (Kokscha; Kokcha), Badakhshan (Badakshan; Badahsan) Province, Afghanistan A 11 x 12 cm spcimen of hexagonal grey white Nepheline xls to over 2 cm with a clear sodalite coating that contains an anisotropic unknown blue phase. Photo: Kevin Ringer, MMI; RWMW Collection |
| © RWMW | Photo ID: 250874 View Count: 150 |
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Ladjuar Medam (Lajur Madan; Lapis-lazuli Mine), Sar-e-Sang District, Koksha Valley (Kokscha; Kokcha), Badakhshan (Badakshan; Badahsan) Province, Afghanistan Sodalite coating Nepheline crystals. Vasco Trancoso collection and photo. Size (overall): 6.5 x 5 x 5 cm Sodalite coated nepheline xls up to 2,5cm across (please see child photo). Outstanding Nepheline/Sodalite (Microprobe Confirmed) specimen with a neon blue impressive colour. The current belief is that a poly sulfide ion is responsible for the ... |
| © vasco trancoso | Photo ID: 226253 View Count: 206 |
Nepheline : (Na,K)[AlSiO4] | |
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Davis Quarry, Dungannon Township, Bancroft District, Hastings Co., Ontario, Canada Nepheline crystal (6 x 4.5 cm) on nepheline and albite. Nepheline crystal shows surface etching. Ex Curt Segeler Collection. |
| © Van King | Photo ID: 189370 View Count: 186 |
Nepheline : (Na,K)[AlSiO4] | |
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Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada Photographed by and in the collection of Doug Merson. |
| © 2005 DM | Photo ID: 31927 View Count: 418 |
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Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada FOV 6.0 x 4.6 mm. Modris B. coll (ex Ron Waddell). The greenish nepheline does not fluoresce orange - a good indication that it has not been replaced by sodalite (as is fairly common at MSH). But the xl is not very sharply formed. The eudialyte really is a hot "shocking pink". There are two stereo child photos - not too useful in this case. |
| Photo ID: 170659 View Count: 219 | |
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Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada FOV 7.8 x 10.5 mm. Modris B. coll (ex DW). Nepheline syenite is one of the major rock types at MSH but good (or even recognizable) nepheine xls are few and far between. These come from a sodalite xenolith. They have not been replaced by sodalite (as sometimes happens). Stereo child photo. |
| Photo ID: 180858 View Count: 162 | |
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Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada FOV 1.5 cm high. Via Dave W. The small pinkish xls have been ID as UK116, the Mn analogue of eudialyte. There are also some small violet prisms of cancrisilite/cancrinite (not analyzed) and some unid xls (perhaps UK53 group). I don't know if the dark stuff is a pyroxene or amphibole - the xls are very twisted and crenulated. Sept 2009: Updated ... |
| Photo ID: 181066 View Count: 148 | |
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Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada FOV 2.5 x 3.4 mm. Modris B. coll (via Dave W). Unusual for MSH despite the abundance of nepheline syenite. These are very fresh looking xls and do not fluoresce orange - a good indication that they have not been replaced by sodalite. Stereo child photo. |
| Photo ID: 180869 View Count: 138 | |
Nepheline : (Na,K)[AlSiO4] | |
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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 5.0 mm. Modris B coll (via Dave W). |
| Photo ID: 180876 View Count: 103 | |
Nepheline : (Na,K)[AlSiO4] | |
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Zijingshan REE deposit, Xing Co., Lyuliang Prefecture, Shanxi Province, China Width of field is 7.0 mm. Collection of Jesse Crawford. The depth of field has been enhanced using Helicon Focus (13 exposures). Equipment: Nikon D-100 digital camera on a homemade microscope |
| © 2008 Jesse Crawford | Photo ID: 175188 View Count: 142 |
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