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Vesuvius & other Volcanic Minerals

Wednesday, 12 December 2018 04:00 PM

Introducing the "Vesuvius & other Volcanic Minerals" gallery which is part of our Special Edition galleries. This gallery contains mineral specimens for sale including humite, hydromagnesite, kalinite, kalsilite, kogarkoite, and kuzelite and more from places like Mt. Vesuvius, Somma Complex, Napoli, Campania, Italy, San Venanzo, Terni Province, Umbria, Italy, Vulcano Island, Sicily, Italy, and Bellerberg volcano, Ettringen, Eifel, Rhineland-Palatinate, Germany.

Humite

with Magnetite - #PD50046
Locality
Mt. Vesuvius, Somma Complex, Napoli, Campania, Italy 
Formula
Mg7(SiO4)3(F,OH)2 
Availability
Sold
Size
7.5 x 6 x 3.5 cm - Sm Cabinet 
Special Info
Antique Specimen 

A good specimen with a 2mm black, octahedral crystal of Magnetite with nicely crystallized orange Humite. The matrix is green Phlogopite with nice crystals. Ex. Geological Institute of the University of Amsterdam.


Humite

Formula
Mg7(SiO4)3(F,OH)2 
Crystal System
Orthorhombic 
Cleavage
Poor, None, None 
Luster
Vitreous (Glassy) 
Color
brown, yellow, white, dark orange 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Conchoidal - Uneven 
Hardness
6-6.5 
Collection
Don Phillips Collection
Special Info
Antique Specimen
Mineralpedia
View Humite
On Dakota Matrix
Previously Sold Humite
On Dakota Matrix
Other Available Humite
WebMineral
View Humite
Mindat
View Humite

Hydromagnesite

var. idrogiobertite - #PD49847
Locality
Mt. Vesuvius, Somma Complex, Napoli, Campania, Italy 
Formula
Mg5(CO3)4(OH)2·4H2
Availability
Available
Price
$95.00
Size
5.5 x 2 x 2 cm - Sm Cabinet 
Tagged
carbonate  
Special Info
Antique Specimen 

This is the variety of Hydromagnesite, idogiobertite, a hydrous carbonate of magnesia. The vial is an antique specimen labeled 1906 and filled with the powder of this mineral. An early reference to this variety can be found in J. Logan Lobley's "Mount Vesuvius". Here Lobley describes the mineral as rare and found enclosed in a large fragment of ancient lava...."Eugenio Scacchi gives it the name Idrogiobertite" (from Vesuvius). Dana (6th Ed) states this variety was named by Scacchi on Dec. 12, 1885. Very few specimes out there would have this varietal name placed upon the specimen. Rather most will call it the proper defined name as "Hydrmagnesite". 


Hydromagnesite

Formula
Mg5(CO3)4(OH)2·4H2
Crystal System
Monoclinic 
Crystal Habit
Acicular, Encrustations 
Cleavage
Perfect, Distinct, None 
Luster
Silky 
Color
colorless, white 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
3.5 
Collection
Don Phillips Collection
Special Info
Antique Specimen
SOLD
Kalinite - PD48073
Kalinite - PD48073

Kalinite

#PD48073
Locality
Mt. Vesuvius, Somma Complex, Napoli, Campania, Italy 
Formula
KAl(SO4)2·11H2
Availability
Sold
Size
4 x 0.6 x 0.6 cm - Miniature 

This mineral is listed with Lobley in "Mount Vesuvius" in 1889 and states that it is "not rare in the crater" and can crystallize in octahedrons, but is usually in fibrous crust. It was a valid mineral in the early days but Mindat states it is a "non-existent species" and may be discredited.


Kalinite

Formula
KAl(SO4)2·11H2
Crystal System
Monoclinic 
Crystal Habit
Fibrous, Water Soluble 
Luster
Vitreous (Glassy) 
Color
colorless, white 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
Collection
Don Phillips Collection
Mineralpedia
View Kalinite
On Dakota Matrix
Previously Sold Kalinite
On Dakota Matrix
Other Available Kalinite
WebMineral
View Kalinite
Mindat
View Kalinite

Kalsilite

#PD48085
Locality
San Venanzo, Terni Province, Umbria, Italy 
Formula
KAlSiO4 
Availability
Sold
Size
9 x 5 x 3 cm - Sm Cabinet 

Thin, colorless, acicular crystals of Kalsilite, a felspathoid. The volcanic rock also contains Melilite, apatite, and Phlogopite. San Venanzo volcano is located about 272km (170mi) northwest of Vesuvius.


Kalsilite

Formula
KAlSiO4 
Crystal System
Trigonal 
Cleavage
Indistinct, Indistinct, None 
Luster
Vitreous - Greasy 
Color
colorless, gray, gray white, white 
Streak
white 
Class
Trigonal - Ditrigonal Pyramidal 
Fracture
Brittle - Conchoidal 
Hardness
Collection
Don Phillips Collection
Mineralpedia
View Kalsilite
On Dakota Matrix
Previously Sold Kalsilite
On Dakota Matrix
Other Available Kalsilite
WebMineral
View Kalsilite
Mindat
View Kalsilite

Kogarkoite

#PD48088
Locality
Vulcano Island, Sicily, Italy 
Formula
Na3SO4
Availability
Sold
Size
6 x 4.5 x 3.5 cm - Sm Cabinet 

Light weight mass of chalky white, rare, Kogarkoite with slightly green Chalcanthite.


Kogarkoite

Formula
Na3SO4
Crystal System
Monoclinic 
Crystal Habit
Pseudo Hexagonal, Earthy, Encrustations 
Luster
Vitreous (Glassy) 
Color
colorless, white, light blue 
Streak
white 
Class
Monoclinic 
Hardness
3.5 
Collection
Don Phillips Collection
SOLD
Kuzelite - PD44595
Kuzelite - PD44595

Kuzelite

#PD44595
Locality
Bellerberg volcano, Ettringen, Eifel, Rhineland-Palatinate, Germany 
Formula
Ca4Al2(OH)12(SO4)·6H2
Availability
Sold
Size
0.7 x 0.6 x 0.4 cm - Thumbnail 

This is 6mm piece from the Bellerberg volcano with tiny 1mm, colorless, striated extremely nice crystal. Mindat reports only three localities worldwide. Rare.


Kuzelite

Formula
Ca4Al2(OH)12(SO4)·6H2
Crystal System
Trigonal 
Crystal Habit
Microscopic Crystals, Platy 
Luster
Vitreous (Glassy) 
Color
white 
Streak
white 
Class
Trigonal - Pyramidal 
Fracture
Uneven 
Hardness
1.5-2 
Collection
Don Phillips Collection
On Dakota Matrix
Previously Sold Kuzelite
On Dakota Matrix
Other Available Kuzelite
WebMineral
View Kuzelite
Mindat
View Kuzelite

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