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Mixed Minerals

Saturday, 05 May 2018 08:00 AM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including dolomite, epidote, manganite, and quartz and more from places like Morenci mine, Greenlee Co., Arizona, United States, Naica, Mun. de Saucillo, Chihuahua, Mexico, Wolfe mine, Herdorf, Siegerland, Germany, and Tres Cerros de Santiño, Artigas dept., Uruguay.

Dolomite

#RW48893
Locality
Morenci mine, Greenlee Co., Arizona, United States 
Formula
CaMg(CO3)2 
Availability
Available
Price
$40.00
Size
7.5 x 2.5 x 3 cm - Sm Cabinet 
Tagged
carbonate  

White Dolomite rhombs with a slight pink color to 4mm.


Dolomite

Formula
CaMg(CO3)2 
Crystal System
Trigonal 
Crystal Habit
Crystalline - Coarse, Massive, Blocky - Rhombohedral 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous (Glassy) 
Color
white, gray, reddish white, brownish white, gray 
Streak
white 
Class
Trigonal - Rhombohedral 
Fracture
Brittle - Conchoidal 
Hardness
3.5-4 
Collection
Robert J. Waidler Collection
Mineralpedia
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Epidote

with Calcite & Prehnite - #49056
Locality
Naica, Mun. de Saucillo, Chihuahua, Mexico 
Formula
Ca2Fe3+Al2(Si2O7)(SiO4)O(OH) 
Availability
Available
Price
$40.00
Size
4.5 x 3.5 x 3.5 cm - Miniature 

A difficult subject to photo since the dark green Epidote competes with the platy Calcite for the light. It is an interesting specimen in that the Calcite forms thin colorless plates to over 1cm with divergent sprays of dark green Epidote to 8mm. With the Epidote and Calcite are tiny cubes of Pyrite. In the matrix is brownish yellow Prehnite.


Epidote

Formula
Ca2Fe3+Al2(Si2O7)(SiO4)O(OH) 
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Fibrous, Massive 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
yellowish green, brownish green, black, yellow, gray 
Streak
grayish white 
Class
Monoclinic - Prismatic 
Fracture
Regular 
Hardness
Mineralpedia
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Manganite

#RW48886
Locality
Wolfe mine, Herdorf, Siegerland, Germany 
Formula
Mn3+O(OH) 
Availability
Available
Price
$55.00
Size
7 x 3.5 x 4.5 cm - Sm Cabinet 

Solid Manganite specimen composed of 3-6mm compact, hackley looking lathes. This is a good specimen from this area known more for it's Rhodochrosite.


Manganite

Formula
Mn3+O(OH) 
Crystal System
Monoclinic 
Crystal Habit
Pseudo Orthorhombic, Massive - Fibrous, Prismatic 
Cleavage
Perfect, None, None 
Luster
Sub Metallic 
Color
black, gray, grayish black 
Streak
dark brown 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
Collection
Robert J. Waidler Collection
Mineralpedia
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Quartz

var. amethyst - #RW49053
Locality
Tres Cerros de Santiño, Artigas dept., Uruguay 
Formula
SiO2 
Availability
Available
Price
$60.00
Size
9 x 8 x 3 cm - Sm Cabinet 

Deep purple layer of good 5-10mm Quartz crystals variety amethyst.


Quartz

Formula
SiO2 
Crystal System
Trigonal 
Crystal Habit
Crystalline - Coarse, Druse, Crystalline - Fine 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
brown, colorless, violet, gray, yellow 
Streak
white 
Class
Trigonal - Trapezohedral 
Fracture
Conchoidal 
Hardness
Collection
Robert J. Waidler Collection
Mineralpedia
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