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0 item @ $0.00  

Mississippi Valley Type deposits

Tuesday, 31 December 2013 05:00 PM

Most mineral collections contain one, two or more specimens from the mining regions of Illinois, Ohio, Kansas, Oklahoma and even Wisconsin. The deposits are large and hosted within the giant limestone formations. This Special Edition will showcase the fabulous Galena, Fluorite and Sphalerite etc found at the these classic US mining districts.

Sphalerite

with Dolomite - #PD37851
Locality
Gordon mine, Picher, Ottawa Co., Oklahoma, United States 
Formula
ZnS 
Availability
Sold
Size
14 x 8 x 6.5 cm - Cabinet 
Tagged
sulfide  

A larger cabinet specimen with deep black Sphalerite crystals to 2.5cm amongst pinkish Dolomite crystals.


Sphalerite

Formula
ZnS 
Crystal System
Isometric 
Crystal Habit
Euhedral Crystals, Granular, Colloform 
Cleavage
Perfect, Perfect, Perfect 
Luster
Resinous - Greasy 
Color
brown, yellow, red, green, black 
Streak
brownish white 
Class
Isometric - Hextetrahedral 
Fracture
Uneven 
Hardness
3.5-4 
Collection
Phillips Collection

Vanadinite

#15179
Locality
El Kwal, Mibladen, Khenifra Prov., Morocco 
Formula
Pb5(VO4)3Cl 
Availability
Sold
Size
10 x 8.5 x 3 cm - Cabinet 

A larger specimen of Vanadinite from this classic locality. The crystals, to 6mm, are smaller and not as lustrous as the other Vanadinite in this Special Edition.  Most of the crystals average about 4mm.


Vanadinite

Formula
Pb5(VO4)3Cl 
Crystal System
Hexagonal 
Crystal Habit
Globular, Prismatic, Nodular 
Cleavage
None, None, None 
Luster
Adamantine 
Color
brown, brownish yellow, brown red, colorless, yellow 
Streak
brownish yellow 
Class
Hexagonal - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
3.5-4 

Witherite

#PD36215
Locality
Rosiclare, Hardin Co., Illinois, United States 
Formula
BaCO3 
Availability
Sold
Size
8 x 7 x 6.5 cm - Sm Cabinet 
Tagged
carbonate  
Special Info
Fluorescent 

A cluster of murky white Witherite with numerous crystals over 2cm. The shape and form of the crystals are classic pseudo-hexagonal dipyramids, which are repeated twins and show deep horizontal striations. Strongly fluorescent blue.


Witherite

Formula
BaCO3 
Crystal System
Orthorhombic 
Crystal Habit
Pseudo Hexagonal, Columnar, Reniform 
Cleavage
Distinct, None, None 
Luster
Vitreous (Glassy) 
Color
colorless, milky white, grayish white, pale yellowish white, pale brownish white 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Sub Conchoidal 
Hardness
3-3.5 
Collection
Phillips Collection
Special Info
Fluorescent
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