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Recently Released New Additions

Rare Minerals Specimens

Tuesday, 24 January 2023 04:00 PM

Introducing the "Rare Minerals Specimens" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including gold, and manganocummingtonite and more from places like Harvard mine, Jamestown, Tuolumne Co., California, United States, and Franklin, Sussex Co., New Jersey, United States.

Gold - 58812
Gold - 58812

Gold

#58812
Locality
Harvard mine, Jamestown, Tuolumne Co., California, United States 
Formula
Au 
Availability
Available
Price
$295.00
Size
3.5 x 2.5 x 1.5 cm - Miniature 
Tagged
native element  

Leaf Gold 1.3 x 1.5cm in milky Quartz. Very nice specimen.


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 
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Gold - 58813
Gold - 58813

Gold

#58813
Locality
Harvard mine, Jamestown, Tuolumne Co., California, United States 
Formula
Au 
Availability
Sold
Size
2.6 x 1.3 x 1 cm - Thumbnail 
Tagged
native element  

A 6 x 7mm Gold leaf with more in Quartz matrix.


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
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Mindat
View Gold
SOLD
Manganocummingtonite - BAC60756
Manganocummingtonite - BAC60756

Manganocummingtonite

(Clino-suenoite) - #BAC60756
Locality
Franklin, Sussex Co., New Jersey, United States 
Formula
□Mn2Mg5Si8O22(OH)2 
Availability
Sold
Size
3 x 2 x 1 cm - Thumbnail 

Dark green, very tightly compact fibrous crystals in two bladed masses. You would never know this was a Cummingtonite. Somewhere along the line they changed the name of Manganocummingtonite to Clino-suenoite.


Manganocummingtonite

Formula
[box]Mn2Mg5Si8O22(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Acicular, Aggregates 
Cleavage
Perfect, Indistinct, None 
Luster
Vitreous (Glassy) 
Color
brownish, greenish white, light green, pink, straw yellow 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
6-6.5 
Collection
William & Anne Cook Collection
Mineralpedia
View Manganocummingtonite
On Dakota Matrix
Previously Sold Manganocummingtonite
On Dakota Matrix
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View Manganocummingtonite
Mindat
View Manganocummingtonite

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