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Neptunite with Joaquinite

#AH52985

Neptunite with Joaquinite

#AH52985
Availability
Sold
Size
8 x 8 x 3.5 cm - Sm Cabinet 
Formula
KNa2LiFe2+2Ti2Si8O24 (RRUFF)
Locality
Gem mine, San Benito Co., California, United States

Sharp, excellent crystals to 6mm in white Natrolite matrix. The crystals appear black but are actually dark red as some of the photos show. There are just a few Joaquinite crystals, which are orange and are less than 1mm.

Neptunite

Formula
KNa2LiFe2+2Ti2Si8O24 
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Tabular, Crystalline - Coarse 
Cleavage
Good, None, None 
Luster
Vitreous (Glassy) 
Color
black, red 
Streak
brown 
Class
Monoclinic - Domatic 
Fracture
Conchoidal 
Hardness
5-6 

Data courtesy of Webmineral.

Collection
Arnold G Hampson Collection
Mineralpedia
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