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Leucophosphite

#BN47883

Leucophosphite

#BN47883
Availability
Sold
Size
7.5 x 4 x 5.5 cm - Sm Cabinet 
Formula
KFe3+2(PO4)2(OH)·2H2O (RRUFF)
Locality
Tip Top mine, Custer Co., South Dakota, United States
Tagged
phosphate , pegmatite mineral

An excellent specimen of purple Leucophosphite with gemmy crystals to 3mm. There are many good crystals and they exhibit some color change depending on your light source. Look at the prov. tab and you will see the old Bill Roberts tag, which states that it is one of the world's best (for that time). This is an ex. Mike Groben specimen with a date of 1976 on the tag. Since then, the Tip Top had been mined deeper and many more specimens were found in the early 1980's.  Nonetheless, still a fantastic specimen. There is some minor Hureaulite crystals.

Leucophosphite

Formula
KFe3+2(PO4)2(OH)·2H2
Crystal System
Monoclinic 
Cleavage
Indistinct, None, None 
Luster
Vitreous - Dull 
Color
brown, brownish yellow, colorless, greenish, white 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
3.5 

Data courtesy of Webmineral.

Collection
Dr. Buford Nichols Collection

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