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Mixed Minerals

Sunday, 11 July 2021 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including eudialyte, freieslebenite, gold, hercynite, and hessite and more from places like Ilimaussaq complex, Narsaq, Kitaa prov., Greenland, Morey dist., Nye Co., Nevada, United States, Idarado mine, Telluride, San Miguel Co., Colorado, United States, La Piana Alp, Premosello Chiovenda, Ossola Valley, Piedmont, Italy, and Harvard mine, Jamestown, Tuolumne Co., California, United States.

Eudialyte

with Aegerine in nepheline syenite - #PD54729
Locality
Ilimaussaq complex, Narsaq, Kitaa prov., Greenland 
Formula
Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 
Availability
Sold
Size
5 x 6 x 5 cm - Sm Cabinet 

Superb crystals to 1.2cm of deep red color and good forms. There are numerous well-formed crystals tightly packed in matrix with Arfvedsonite.


Eudialyte

Formula
Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 
Crystal System
Trigonal 
Crystal Habit
Massive - Granular, Tabular 
Cleavage
Imperfect, None, None 
Luster
Vitreous (Glassy) 
Color
pinkish red, red, yellow, yellowish brown, violet 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Uneven 
Hardness
5-5.5 
Collection
Don Phillips Collection
Mineralpedia
View Eudialyte
On Dakota Matrix
Previously Sold Eudialyte
On Dakota Matrix
Other Available Eudialyte
WebMineral
View Eudialyte
Mindat
View Eudialyte

Freieslebenite

#56079
Locality
Morey dist., Nye Co., Nevada, United States 
Formula
AgPbSbS3 
Availability
Sold
Size
3.5 x 1.5 x 0.7 cm - Miniature 
Tagged
sulfide , silver  
Special Info
EDS Confirmed 

A 1mm bundle of acicular crystals in two spots. Rare.


Freieslebenite

Formula
AgPbSbS3 
Crystal System
Monoclinic 
Cleavage
Indistinct, None, None 
Luster
Metallic 
Color
gray, silver white, blackish lead gray 
Streak
whitish gray 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Conchoidal 
Hardness
2.5 
Special Info
EDS Confirmed
SOLD
Freieslebenite - 56062
Freieslebenite - 56062

Freieslebenite

#56062
Locality
Morey dist., Nye Co., Nevada, United States 
Formula
AgPbSbS3 
Availability
Sold
Size
3.5 x 2 x 1.5 cm - Miniature 
Tagged
sulfide , silver  

A single crystal blade tucked in a little 1mm vug.


Freieslebenite

Formula
AgPbSbS3 
Crystal System
Monoclinic 
Cleavage
Indistinct, None, None 
Luster
Metallic 
Color
gray, silver white, blackish lead gray 
Streak
whitish gray 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Conchoidal 
Hardness
2.5 

Gold

in Quartz - #RW56076
Locality
Idarado mine, Telluride, San Miguel Co., Colorado, United States 
Formula
Au 
Availability
Sold
Size
8 x 4 x 1.3 cm - Sm Cabinet 
Tagged
native element  

An excellent rich specimen of Quartz with abundant grains of Gold. One side is sliced, which shows the Gold best. The otherside is rough and still shows the Gold strigers. There is minor Chalcopyrite and other sulfides.


Gold

Formula
Au 
Crystal System
Isometric 
Crystal Habit
Arborescent, Platy, Granular 
Cleavage
None, None, None 
Luster
Metallic 
Color
yellow, pale yellow, orange, yellow white, reddish white 
Streak
yellow 
Class
Isometric - Hexoctahedral 
Fracture
Hackly 
Hardness
2.5-3 
Mineralpedia
View Goldmanite
On Dakota Matrix
Previously Sold Gold
On Dakota Matrix
Other Available Gold
WebMineral
View Gold
Mindat
View Gold

Hercynite

#52611
Locality
La Piana Alp, Premosello Chiovenda, Ossola Valley, Piedmont, Italy 
Formula
Fe2+Al2O4 
Availability
Available
Price
$150.00
Size
3.5 x 3 x 3.5 cm - Miniature 

Malformed dull black, large octahedral Hercynite crystal. This is probably one of the better Hercynite crystals I have seen.


Hercynite

Formula
Fe2+Al2O4 
Crystal System
Isometric 
Crystal Habit
Euhedral Crystals, Massive - Granular, Granular 
Cleavage
Indistinct, Indistinct, Indistinct 
Luster
Vitreous (Glassy) 
Color
black 
Streak
dark green 
Class
Isometric - Hexoctahedral 
Fracture
Uneven 
Hardness
7.5 
Collection
Barbara Cureton Collection

Hessite

with Gold & Chlorargyrite - #56072
Locality
Harvard mine, Jamestown, Tuolumne Co., California, United States 
Formula
Ag2Te 
Availability
Sold
Size
2 x 2 x 1.5 cm - Thumbnail 
Tagged
tellurium , silver  
Special Info
EDS Confirmed 

Leaf Gold to 5mm with a patch of dull grey Hessite less than 1mm with nearby tannish grey waxy Chlorargyrite to 3mm long. Neither of these silver minerals are reported on Mindat. EDS/Raman


Hessite

Formula
Ag2Te 
Crystal System
Monoclinic 
Crystal Habit
Modified pseudocubic, irregular and distorted 
Cleavage
Indistinct, None, None 
Luster
Metallic 
Color
lead gray, steel gray 
Streak
light gray 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
1.5-2 
Special Info
EDS Confirmed
Mineralpedia
View Hessite
On Dakota Matrix
Previously Sold Hessite
On Dakota Matrix
Other Available Hessite
WebMineral
View Hessite
Mindat
View Hessite

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