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Mixed Minerals

Friday, 31 July 2020 08:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including pyroxmangite, quartz, realgar, rhodonite, rutile, and silver and more from places like Sunnyside mine, Silverton, San Juan Co., Colorado, United States, Vanna, Waziristan, Pakistan, Getchell mine, Humboldt Co., Nevada, United States, Långban, Filipstad, Värmland, Sweden, Graves Mountain, Lincoln Co., Georgia, United States, and Houghton Co., Michigan, United States.

Pyroxmangite

#AH53785
Locality
Sunnyside mine, Silverton, San Juan Co., Colorado, United States 
Formula
Mn2+SiO3 
Availability
Sold
Size
21 x 17 x 8 cm - Cabinet 

Once though to be just Rhodonite was correctly identified later as Pyroxmangite. This is a large specimen with good pink color and granular sulfides.

Because of the size and weight of the specimen, an additional charge is calculated into the shipping cost. Exact costs will be determined at the post office and a refund or a request for more funds will be issued.


Pyroxmangite

Formula
Mn2+SiO3 
Crystal System
Triclinic 
Crystal Habit
Massive, Massive - Granular 
Cleavage
Perfect, Perfect, None 
Luster
Vitreous - Pearly 
Color
pink, rose pink, purplish pink, yellowish red brown, brown 
Streak
white 
Class
Triclinic - Pinacoidal 
Hardness
5.5-6 
Collection
Arnold G Hampson Collection

Quartz

faden - #AH53778
Locality
Vanna, Waziristan, Pakistan 
Formula
SiO2 
Availability
Sold
Size
6 x 4 x 0.8 cm - Sm Cabinet 

Waterclear, tabular "faden" Quartz with a clearly visible white thread probably containing solution liquid and gas. Faden Quartz is usually tabular like this one and contain the white thread down the center. The thread is formed through repeated fracturing and healing while the crystal is growing in an open fracture. 


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
Arnold G Hampson Collection
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Realgar

with Orpiment - #GJ53799
Locality
Getchell mine, Humboldt Co., Nevada, United States 
Formula
AsS 
Availability
Sold
Size
10 x 5.5 x 4 cm - Cabinet 
Tagged
sulfide  

Bright red acicular crystals of Realgar to 2mm in vugs.


Realgar

Formula
AsS 
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Massive - Granular, Druse 
Cleavage
Good, None, None 
Luster
Sub Metallic 
Color
aurora red, orange yellow, dark red 
Streak
orange 
Class
Monoclinic - Prismatic 
Fracture
Sectile 
Hardness
1.5-2 
Collection
Jungles Collection
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Rhodonite

#PD53747
Locality
Långban, Filipstad, Värmland, Sweden 
Formula
Mn2+SiO3 
Availability
Sold
Size
4 x 5 x 2 cm - Miniature 

A representative specimen of pink Rhodonite showing blocky crystals to 5mm in a small 2.5 x 2.5cm cavity.

Old Dr. David H. Garske label, although I'm not sure which was the Richterite.


Rhodonite

Formula
Mn2+SiO3 
Crystal System
Triclinic 
Crystal Habit
Tabular, Massive, Massive - Granular 
Cleavage
Perfect, Perfect, None 
Luster
Vitreous (Glassy) 
Color
pink, rose red, brownish red, black, yellow 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Uneven 
Hardness
Collection
Don Phillips Collection
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Rutile

#WR53807
Locality
Graves Mountain, Lincoln Co., Georgia, United States 
Formula
TiO2 
Availability
Sold
Size
7.5 x 3 x 3 cm - Sm Cabinet 

Deep red, very reflective and lustrous Rutile crystals, with one twinned, to 1.7cm.


Rutile

Formula
TiO2 
Crystal System
Tetragonal 
Crystal Habit
Acicular, Prismatic, Massive - Granular 
Cleavage
Distinct, None, None 
Luster
Adamantine 
Color
blood red, bluish, brownish yellow, brown red, violet 
Streak
grayish black 
Class
Tetragonal - Ditetragonal Dipyramidal 
Fracture
Uneven 
Hardness
6-6.5 
Collection
Willard L. Roberts Collection
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Silver

with Copper - #WR53824
Locality
Houghton Co., Michigan, United States 
Formula
Ag 
Availability
Sold
Size
10.5 x 6 x 2.5 cm - Cabinet 
Tagged
native element  

Large Silver and Copper "halfbreed" nugget with the Silver clearly visible and occupying the saddle of the specimen about 2cm wide. Total weight is 15.2 OZ. It is out the late Willard L. Roberts collection author of the classic work Encyclopedia of Mineralogy. Roberts' tag included (see prov. tab).

 


Silver

Formula
Ag 
Crystal System
Isometric 
Crystal Habit
Arborescent, Dendritic, Massive 
Cleavage
None, None, None 
Luster
Metallic 
Color
silver white, gray white, gray 
Streak
silver white 
Class
Isometric - Hexoctahedral 
Fracture
Hackly 
Hardness
2.5-3 
Collection
Willard L. Roberts Collection
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