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Hureaulite with Leucophosphite, Jahnsite, Collinsite & Rockbridgeite

#BN54275

Hureaulite with Leucophosphite, Jahnsite, Collinsite & Rockbridgeite

#BN54275
Availability
Available
Price
$575.00
Size
12 x 11 x 10 cm - Cabinet 
Formula
Mn2+5(PO4)2(PO3OH)2·4H2O (RRUFF)
Locality
Tip Top mine, Custer Co., South Dakota, United States

A large cabinet specimen of hydrothermally altered parent Triphylite. On one side a large vug of 6 x 5cm is filled with dark pinkish red crystals of Hureaulite to at least 7mm. With the Hureaulite are great purple Leucophosphite crystals to 2mm. Large dark, dull black balls of Rockbridgeite also occur in this same vug. Most of the time Hureaulite from the Tip Top is a light pink, which is on the other side of this specimen. 

On the flip side is another vug  filled with light pink Hureaulite crystals to 1mm. These are associated with a light green Leucophosphite, which is a direct replacement of the Triphylite. But, a redeposited purple Leucophosphite fills the other half of the vug. That line of white crystals seen in the last photo is a group of Collinsite crystals less than 1mm in size. Yellow prismatic Jahnsite can be found along the fringes of the vug.

May cost extra to ship.

Hureaulite

Formula
Mn2+5(PO4)2(PO3OH)2·4H2
Crystal System
Monoclinic 
Crystal Habit
Massive, Compact, Fibrous 
Cleavage
Distinct, None, None 
Luster
Vitreous - Greasy 
Color
red, white, grayish white, yellowish white, reddish white 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Uneven 
Hardness

Data courtesy of Webmineral.

Collection
Dr. Buford Nichols Collection

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