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Leucite (feldspathoid)

#PD47340
SOLD
Leucite from Vesuvius, Naples, Campania, Italy - PD47340
Leucite from Vesuvius, Naples, Campania, Italy - PD47340

Leucite (feldspathoid)

#PD47340
Availability
Sold
Size
4.5 x 3 x 2.5 cm - Miniature 
Formula
K(Si2Al)O6 (RRUFF)
Locality
Vesuvius, Naples, Campania, Italy

This locality is often used for Leucite photos in textbooks. It is a relatively uncommon mineral found in potassic-rich igneous rocks, either lavas or shallow intrusives. The crystals in this specimen rich 4mm. Leucite crystals, like these, are trapezohedral, but mostly rounded.

Leucite

Formula
K(Si2Al)O6 
Crystal System
Tetragonal 
Crystal Habit
Crystalline - Coarse 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
colorless, gray, yellow gray, white 
Streak
white 
Class
Tetragonal - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
6 

Data courtesy of Webmineral.

Collection
Phillips Collection
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