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  

Sale Minerals

Sunday, 30 August 2020 06:00 PM

Introducing the "Sale Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including giniite, quartz, rhodochrosite, and vanadinite and more from places like Sandamap pegmatite, Dâures, Erongo, Namibia, Los Arcoiris, Ojo Laguna, Chihuahua, Mexico, Kuruman, Kalahari Mn fields, Northern Cape Province, South Africa, and Touissit dist., Oujda-Angad prov., Oriental, Morocco.

Giniite

#51096
Locality
Sandamap pegmatite, Dâures, Erongo, Namibia 
Formula
Fe2+Fe3+4(PO4)4(OH)2·2H2
Availability
Available
Price
$95.00
Reduced Price
$50.00
Size
Micromount 
Tagged
phosphate , pegmatite mineral  
Special Info
Type Locality 

A micromount with a 1cm specimen showing crystalline black grains of which is the Giniite. Very Rare


Giniite

Formula
Fe2+Fe3+4(PO4)4(OH)2·2H2
Crystal System
Monoclinic 
Crystal Habit
Crystalline - Fine 
Cleavage
None, None, None 
Luster
Vitreous - Greasy 
Color
blackish brown, black, blackish green 
Streak
olive green 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
3-4 
Special Info
Type Locality
On Dakota Matrix
Previously Sold Giniite
On Dakota Matrix
Other Available Giniite
WebMineral
View Giniite
Mindat
View Giniite

Quartz

var. agate - #52801
Locality
Los Arcoiris, Ojo Laguna, Chihuahua, Mexico 
Formula
SiO2 
Availability
Available
Price
$150.00
Reduced Price
$55.00
Size
4.5 x 3.5 x 2.5 cm - Miniature 

Both sides this specimen have bands of various shades of red and near the center are light purple bands. The photo on the left is dry and the photo on the right is wet. Wetting agate specimens always brings out the color. Beautiful specimen from this locality. All of the close-ups are wet


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
Mineralpedia
View Quartz
On Dakota Matrix
Previously Sold Quartz
On Dakota Matrix
Other Available Quartz
WebMineral
View Quartz
Mindat
View Quartz

Rhodochrosite

#WR53944
Locality
Kuruman, Kalahari Mn fields, Northern Cape Province, South Africa 
Formula
MnCO3 
Availability
Available
Price
$1,495.00
Reduced Price
$950.00
Size
7 x 7.5 x 5.5 cm - Sm Cabinet 
Tagged
carbonate  

Deep glassy red scalenohedral crystals to 5mm on the face. Along the cross-sections of the specimen you can see the concentric growth patterns from a black Hausmannite matrix which develops into crystalline red Rhodochrosite and finally into an open space where the crystals form.


Rhodochrosite

Formula
MnCO3 
Crystal System
Trigonal 
Crystal Habit
Massive - Granular, Columnar, Botryoidal 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous (Glassy) 
Color
pinkish red, red, rose red, yellowish gray, brown 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Brittle - Conchoidal 
Hardness
Collection
Willard L. Roberts Collection

Vanadinite

#WR53666
Locality
Touissit dist., Oujda-Angad prov., Oriental, Morocco 
Formula
Pb5(VO4)3Cl 
Availability
Available
Price
$275.00
Reduced Price
$175.00
Size
6 x 5 x 3 cm - Sm Cabinet 
Tagged
vanadium  

HUGE crystals of creamy brown Vanadinite to 1.5cm with some 1cm terminations. Excellent specimen, very impressive!


Vanadinite

Formula
Pb5(VO4)3Cl 
Crystal System
Hexagonal 
Crystal Habit
Globular, Prismatic, Nodular 
Cleavage
None, None, None 
Luster
Adamantine 
Color
brown, brownish yellow, brown red, colorless, yellow 
Streak
brownish yellow 
Class
Hexagonal - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
3.5-4 
Collection
Willard L. Roberts Collection

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