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0 item @ $0.00  

Montgomeryite with Englishite and Robertsite

#BN55087

Montgomeryite with Englishite and Robertsite

#BN55087
Availability
Sold
Size
10 x 7 x 3.5 cm - Cabinet 
Formula
Ca4MgAl4(PO4)6(OH)4·12H2O (RRUFF)
Locality
Tip Top mine, Custer Co., South Dakota, United States
Tagged
phosphate , pegmatite mineral

A Quartz matrix specimen with flat-lying red laths of Montgomerite from 1 to 2mm and white balls of Englishite and tiny deep red Robertsite, less than 0.25mm.

Montgomeryite

Formula
Ca4MgAl4(PO4)6(OH)4·12H2
Crystal System
Monoclinic 
Cleavage
Perfect, Indistinct, None 
Luster
Vitreous (Glassy) 
Color
colorless, yellowish, white, green, red 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness

Data courtesy of Webmineral.

Collection
Dr. Buford Nichols Collection

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