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Mineral Specimens with Montgomeryite
- 4 specimens selected
11.9 x 11.7 x 3.8 cm. This is a large phosphate nodule from this classic locality which is very rich in some of the rare species found mostly in older specimens and not around so much in pieces collected in more recent times. The bright green is the Variscite with a large amount of canary-yellow Crandalite and some gray Wardite present around the green core. The darker green circles are Montgomeryite, for which this is the type locality. Ex. Rice Northwest Museum Collection.
12.3 x 4.6 x 4.6 cm. A fine cabinet specimen of rare phosphates from the famous Tip Top Mine of South Dakota. Light salmon-pink sprays of bladed montgomeryite are richly scattered and stand out on a large, well-formed microcline cleavage that is covered with drusy white whitlockite.
11.1 x 6.9 x 5.3 cm. Montgomeryite and Jahnsite are rare phosphates and the Tip Top Quarry is the Type Locality for jahnsite. Lustrous, orange Montgomeryite crystals and contrasting, black Jahnsite and rockbridgeite richly cover the partially euhedral cabinet sized orthoclase crystal on this fine specimen. There may be mitridatite as well. Highly representative, very rich and a large specimen with these rare phosphates from this well-known locale. Collected in the 1980s.
ex. Rice Northwest Museum
This is a relatively early Rice acquisition, donated by the Rice family. It is a large phosphate nodule from this classic locality which is VERY VERY rich in some of the rare species found mostly in older specimens and not around so much in pieces colelcted in more recent times. The bright green is the Variscite with a large amount of canary-yellow Crandalite (rare!) and some gray Wardite present around the green core. The darker green circles are Montgomeryite, for which this is the type locality. This would be considered a VERY RICH specimen for the species, by the way. According to Mindat, this is also the type locality for WARDITE as well, which I had not known! Lastly, note the thickness of this specimen...it is the end of a nodule, and thick, so it could be sliced into at least two more sections if desired, increasing the total value of the pieces as each is worth about the same, I would think.
- 4 specimens selected
Rob Lavinsky, rob@irocks.com
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share specimen![Variscite, Montgomeryite, Crandallite, Wardite from Clay Canyon, Fairfield, Oquirrh Mts, Utah Co., Utah, USA [db_pics/mdpics/MD-177938a.jpg]](db_pics/mdpics/MD-177938a.jpg)
![Montgomeryite, Whitlockite, Microcline from Tip Top Mine (Tip Top pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USA [db_pics/mdpics/MD-179402a.jpg]](db_pics/mdpics/MD-179402a.jpg)
![Montgomeryite, Whitlockite, Microcline from Tip Top Mine (Tip Top pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USA [db_pics/mdpics/MD-179402b.jpg]](db_pics/mdpics/MD-179402b.jpg)
![Montgomeryite, Jahnsite from Tip Top Mine (Tip Top pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USA [db_pics/mdpics/MD-204197a.jpg]](db_pics/mdpics/MD-204197a.jpg)
![Variscite with Montgomeryite (TL), Crandalite and Wardite (TL) from Clay Canyon, Fairfield, Salt Lake County, Utah, USA [db_pics/pics/rice-01a.jpg]](db_pics/pics/rice-01a.jpg)
![Variscite with Montgomeryite (TL), Crandalite and Wardite (TL) from Clay Canyon, Fairfield, Salt Lake County, Utah, USA [db_pics/pics/rice-01b.jpg]](db_pics/pics/rice-01b.jpg)