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Mineralpedia Details for Vesuvianite

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Vesuvianite

Vesuvianite

Named for the locality of its discovery at Mount Vesuvius in Italy. Vesuvianite is formed within skarns that formed as a result of regional or contact metamporphism of limestones, and in gabbros containing garnet, mafic and ultramafic rocks as well as serpentinites. Vesuvianite is found in over 1,000 localities worldwide. Sometimes called idocrase.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/vesuvianite.pdf

Formula
(Ca,Na)19(Al,Mg,Fe)13(SiO4)10(Si2O7)4(OH,F,O)10 
Crystal System
Tetragonal 
Crystal Habit
Massive, Columnar, Granular 
Cleavage
Indistinct, Indistinct, Indistinct 
Luster
Vitreous - Resinous 
Color
blue, brown, green, yellow, white 
Streak
white 
Class
Tetragonal - Dipyramidal 
Fracture
Sub Conchoidal 
Hardness
6.5 
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Vesuvianite from Alchuri, Shigar Valley, Balistan, Northern Areas, Pakistan

Vesuvianite
            from Alchuri, Shigar Valley, Balistan, Northern Areas, Pakistan

This specimen is highly lustrous with deep root beer colored almost cylindrical crystals. The largest crystal is 9mm.

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Vesuvianite (cerium rich) from near Dallas Gem mine, San Benito Co., California, United States

Vesuvianite (cerium rich)
            from near Dallas Gem mine, San Benito Co., California, United States

Doubly terminated deep red prismatic Vesuvianite with black Andradite (melanite) garnet. A paper in the American Mineralogist v. 51 page 381 states that these Vesuvianites are rich in cerium and other rare earths.

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Vesuvianite from Crestmore, Riverside Co., California, United States

Vesuvianite
            from Crestmore, Riverside Co., California, United States

An olive green sharp euhedral crystal to 1.5cm across in blue Calcite.

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Vesuvianite from Jeffrey mine, Asbestos, Quebec, Canada

Vesuvianite
            from Jeffrey mine, Asbestos, Quebec, Canada

Pink to yellow sharp, gemmy crystal group.

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