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 & Systematic Minerals

Friday, 07 February 2020 09:00 PM

Introducing the "Rare & Systematic Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including arrojadite, axinite-(fe), beryl, clinoclase, cyprine, and edoylerite and more from places like Big Fish River, Dawson dist., Yukon Territory, Canada, Dal'negorsk, Primorsky Kray, Russia, Teofilo Otoni, Minas Gerais, Southeast Region, Brazil, Majuba Hill mine, Pershing Co., Nevada, United States, Picuris Range, Glenwoody dist., Taos Co., New Mexico, United States, and Clear Creek mine, San Benito Co., California, United States.

SOLD
Arrojadite - BN52292
Arrojadite - BN52292

Arrojadite

#BN52292
Locality
Big Fish River, Dawson dist., Yukon Territory, Canada 
Formula
KNa3(CaNa2)Fe2+13Al(PO4)11(PO3OH)(OH)2 
Availability
Sold
Size
3.5 x 2 x 1 cm - Miniature 
Tagged
phosphate  

Really not too sure which Arrojaite this is, but likely it is Arrojadite-(KNa). It is dark olive green, translucent with sub-parallel tabular crystals stacked with roof-like terminations.  Either which way the crystals are excellent and are not found in pegmatites like well crystallized. It is rather, a black shale phosphate.


Arrojadite

Formula
KNa4CaMn++4Fe++10Al(PO4)12(OH,F)2 
Crystal System
Monoclinic 
Cleavage
Distinct, None, None 
Luster
Vitreous - Greasy 
Color
olive green, clove brown, yellow 
Streak
green gray 
Class
Monoclinic - Domatic 
Fracture
Conchoidal - Uneven 
Hardness
Collection
Dr. Buford Nichols Collection

Axinite-(Fe)

#BN52300
Locality
Dal'negorsk, Primorsky Kray, Russia 
Formula
Ca4Fe2+2Al4[B2Si8O30](OH)2 
Availability
Sold
Size
3.5 x 3.5 x 1.5 cm - Miniature 

Brown to purplish brown sharply pointed crystals to 6mm in a real nice cluster.


Axinite-(Fe)

Formula
Ca4Fe2+2Al4[B2Si8O30](OH)2 
Crystal System
Triclinic 
Crystal Habit
Massive - Granular, Lamellar 
Cleavage
Distinct, Poor, Poor 
Luster
Vitreous (Glassy) 
Color
brown, purplish blue, gray, greenish yellow 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Brittle - Conchoidal 
Hardness
6.5-7 
Collection
Dr. Buford Nichols Collection

Beryl

var. aquamarine - #AH52149
Locality
Teofilo Otoni, Minas Gerais, Southeast Region, Brazil 
Formula
Be3Al2Si6O18 
Availability
Available
Price
$125.00
Size
5.5 x 1 x 1 cm - Sm Cabinet 
Tagged
beryllium , pegmatite mineral  

Gemmy light aqua blue terminated crystal with good luster and nice vertical striations.


Beryl

Formula
Be3Al2Si6O18 
Crystal System
Hexagonal 
Crystal Habit
Crystalline - Coarse, Prismatic, Columnar 
Cleavage
Imperfect, None, None 
Luster
Vitreous - Resinous 
Color
green, blue, yellow, colorless, pink 
Streak
white 
Class
Hexagonal - Dihexagonal Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
7.5-8 
Collection
Arnold G Hampson Collection
Mineralpedia
View Beryl
On Dakota Matrix
Previously Sold Beryl
On Dakota Matrix
Other Available Beryl
WebMineral
View Beryl
Mindat
View Beryl

Clinoclase

#47740
Locality
Majuba Hill mine, Pershing Co., Nevada, United States 
Formula
Cu3AsO4(OH)3 
Availability
Sold
Size
6 x 6 x 3 cm - Sm Cabinet 
Tagged
arsenate , copper  

Fantastic, eye-catching deep blue acicular crystals in scattered singles and radial groups to 2mm.


Clinoclase

Formula
Cu3AsO4(OH)3 
Crystal System
Monoclinic 
Crystal Habit
Crystals rare, typically needlelike, tabular, as rosettes and radial fibrous spherical aggregates, as crusts and coatings. 
Cleavage
perfect 
Luster
Vitreous, pearly on cleavages 
Color
Dark greenish blue to greenish black; in transmitted light, blue-green. 
Streak
Bluish green 
Geological Setting
A rare secondary mineral in the oxidized zone of some arsenic-rich hydrothermal base-metal deposits. 
Class
2/m - Prismatic 
Fracture
Uneven 
Hardness
2.5 - 3 

Cyprine

with Thulite & Piedmontite - #AH51439
Locality
Picuris Range, Glenwoody dist., Taos Co., New Mexico, United States 
Formula
Ca19Cu2+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10](OH)(OH)9 
Availability
Sold
Size
6 x 5 x 2 cm - Sm Cabinet 
Tagged
copper  

Crude blue crystals of Cyprine with red Piedmontite and pink Zoisite variety thulite.


Collection
Arnold G Hampson Collection
On Dakota Matrix
Previously Sold Cyprine
On Dakota Matrix
Other Available Cyprine
WebMineral
View Cyprine
Mindat
View Cyprine

Edoylerite

#36937
Locality
Clear Creek mine, San Benito Co., California, United States 
Formula
Hg2+3(Cr6+O4)S2 
Availability
Sold
Size
2 x 1.5 x 1 cm - Thumbnail 
Special Info
Type Locality 

Very tiny, less than 0.5mm, bright yellow acicular crystals in a single vug with Cinnabar. Edoylerite crystals do not get much bigger than this. Extremely rare.


Edoylerite

Formula
Hg2+3(Cr6+O4)S2 
Crystal System
Monoclinic 
Crystal Habit
Acicular, Prismatic, Stellate 
Cleavage
Good, Fair, None 
Luster
Adamantine 
Color
greenish yellow, orange 
Streak
yellow 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Subconchoidal 
Hardness
Special Info
Type Locality

All photos by Dakota Matrix and are Copyrighted © and may not be used without permission. Copyright © 2020 - Dakota Matrix Minerals, Inc. Privacy | Terms & Conditions | Site Map