mineral specimens
rare minerals
mineral dealer
systematic minerals
Black Hills minerals
fine minerals
mineral dealer
Dana minerals
IMA minerals
mineral collections
rock and minerals
gem crystal
0 item @ $0.00  

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 decrespignyite-(y), edgarite, eglestonite, gold and more from places like Paratoo Cu mine, Mt Lofty Ranges, South Australia, Australia, Khibiny Massif, Kola Peninsula, Russia, Cahill mine, Humboldt Co., Nevada, United States, Harvard mine, Jamestown, Tuolumne Co., California, United States.

Decrespignyite-(Y)

#59801
Locality
Paratoo Cu mine, Mt Lofty Ranges, South Australia, Australia 
Formula
Y4Cu(CO3)4Cl(OH)5·2H2
Availability
Sold
Size
5 x 3 x 1 cm - Miniature 
Tagged
carbonate , REE mineral  
Special Info
Type Locality 

Rich specimen with all sky blue Decrespignyite-(Y).


Decrespignyite-(Y)

Formula
Y4Cu(CO3)4Cl(OH)5·2H2
Crystal System
Monoclinic 
Crystal Habit
Efflorescences, Globular 
Cleavage
None, None, None 
Luster
Vitreous - Pearly 
Color
intense royal blue, turquoise blue 
Streak
pale blue 
Class
Monoclinic 
Hardness
Special Info
Type Locality
SOLD
Edgarite - BAC60900
Edgarite - BAC60900

Edgarite

#BAC60900
Locality
Khibiny Massif, Kola Peninsula, Russia 
Formula
FeNb3S6 
Availability
Sold
Size
1.5 x 1 x 1 cm - Thumbnail 
Tagged
sulfide  

Edgarite is an unusual nioboum sulfide. It is the only niobium sulfide known. On this specimen it occurs as 1-2mm silvery crystal plates. This is the only locality to date.


Edgarite

Formula
FeNb3S6 
Crystal System
Hexagonal 
Crystal Habit
Platy 
Cleavage
Perfect, None, None 
Luster
Metallic 
Color
dark gray, black 
Class
Hexagonal - Trapezohedral 
Hardness
2-2.5 
Collection
William & Anne Cook Collection
On Dakota Matrix
Previously Sold Edgarite
On Dakota Matrix
Other Available Edgarite
WebMineral
View Edgarite
Mindat
View Edgarite
SOLD
Eglestonite - BAC60758
Eglestonite - BAC60758

Eglestonite

with Cinnabar - #BAC60758
Locality
Cahill mine, Humboldt Co., Nevada, United States 
Formula
Hg1+6OCl3(OH) 
Availability
Sold
Size
2 x 2 x 1 cm - Thumbnail 

Yellow earthy coatings on Cinnabar.


Eglestonite

Formula
Hg1+6OCl3(OH) 
Crystal System
Isometric 
Cleavage
None, None, None 
Luster
Adamantine - Resinous 
Color
brown, brownish yellow, yellow, dark brown, orange 
Streak
light yellow 
Class
Isometric - Hexoctahedral 
Fracture
Brittle - Conchoidal 
Hardness
2-3 
Collection
William & Anne Cook Collection

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 
Mineralpedia
View Goldmanite
On Dakota Matrix
Previously Sold Gold
On Dakota Matrix
Other Available Gold
WebMineral
View Gold
Mindat
View Gold

Gold

#58813
Locality
Harvard mine, Jamestown, Tuolumne Co., California, United States 
Formula
Au 
Availability
Available
Price
$195.00
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
View Gold
Mindat
View Gold

Gold

#58815
Locality
Harvard mine, Jamestown, Tuolumne Co., California, United States 
Formula
Au 
Availability
Sold
Size
3 x 3 x 1.7 cm - Thumbnail 
Tagged
native element  

Stringers of Gold lacing milky white Quartz with the largest leaf to 1.2cm.


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

All photos by Dakota Matrix and are Copyrighted © and may not be used without permission. Copyright © 2023 - Dakota Matrix Minerals, Inc. Privacy | Terms & Conditions | Site Map