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0 item @ $0.00  

Londonite

#38264

Londonite

#38264
Availability
Sold
Size
4.5 x 2 x 3 cm - Miniature 
Formula
CsBe5Al4B11O28 (RRUFF)
Locality
Antsongomvato mine, Betroka dist., Antananarivo, Madagascar
Tagged
beryllium

A 1cm and a 6mm Londonite-Rhodizite crystal group on matrix with tourmaline. You would need to take a slice of this amd probe it to determine the mineralogical zones of where Londonite phases from Rhodizite. You cannot visually tell.

Londonite

Formula
CsBe5Al4B11O28 
Crystal System
Isometric 
Crystal Habit
Euhedral Crystals 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
colorless, white, yellow 
Streak
white 
Class
Isometric - Hextetrahedral 
Fracture
Brittle - Conchoidal 
Hardness

Data courtesy of Webmineral.

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