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0 item @ $0.00  

Fluorite var. yttrofluorite

#62348

Fluorite var. yttrofluorite

#62348
Availability
Sold
Size
11 x 6.5 x 4 cm - Cabinet 
Formula
(Ca1-xYx)F2+x where 0.05< x (RRUFF)
Locality
near Foxton, Jefferson Co., Colorado, United States
Tagged
REE mineral

A large mass of pinkish or flesh colored "yttrofluorite", a discredited species and redefined as a variety of Fluorite since yttrium only substitutes for calcium in the Fluorite in small amounts.

Fluorite

Formula
CaF2 
Crystal System
Isometric 
Crystal Habit
Crystalline - Coarse, Massive - Granular, Disseminated 
Cleavage
Three perfect, octahedral cleavages. 
Luster
Vitreous (Glassy) 
Color
purple, clear, yellow, green, red, blue 
Streak
white 
Geological Setting
Occurs in a wide range of geologic environments including low temperature Missississippi Valley lead-zinc deposits, hydrothermal gold deposits, Alpine cleft metamorphic environments  
Class
Isometric - Hexoctahedral 
Fracture
Uneven 
Hardness

Data courtesy of Webmineral.

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