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  

Mixed Minerals

Sunday, 13 September 2020 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including lawsonite, leucosphenite, minasragrite, noelbensonite, pyrargyrite, and rhodonite and more from places like Reed Station, Tiburon Peninsula, Marin Co., California, United States, Yubileinaya pegmatite, Karnasurt Mt., Lovozero Massif, Kola Peninsula, Russia, Minas Ragra, Huayllay dist., Pasco dept., Peru, Woods mine, Darling Co., New South Wales, Australia, Bote mine, Zacatecas, Mexico.

Lawsonite

#54044
Locality
Reed Station, Tiburon Peninsula, Marin Co., California, United States 
Formula
CaAl2Si2O7(OH)2·H2
Availability
Sold
Size
7 x 4.5 x 4 cm - Sm Cabinet 

Blue partial crystal sections of this rare metamorphic mineral to over 1cm. Rich piece.


Lawsonite

Formula
CaAl2Si2O7(OH)2·H2
Crystal System
Orthorhombic 
Crystal Habit
Prismatic, Tabular 
Cleavage
Perfect, Perfect, Poor 
Luster
Vitreous - Greasy 
Color
colorless, white, gray, blue, pinkish 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Uneven 
Hardness
7.5 
Mineralpedia
View Lawsonite
On Dakota Matrix
Previously Sold Lawsonite
On Dakota Matrix
Other Available Lawsonite
WebMineral
View Lawsonite
Mindat
View Lawsonite

Leucosphenite

with Raite - #PD54022
Locality
Yubileinaya pegmatite, Karnasurt Mt., Lovozero Massif, Kola Peninsula, Russia 
Formula
Na4BaTi2B2Si10O30 
Availability
Sold
Size
4 x 2 x 2.5 cm - Miniature 

Blue grains of Leucosphenite, a titanium mineral, to 1.6cm with fine acicular sprays of Raite. 


Leucosphenite

Formula
Na4BaTi2B2Si10O30 
Crystal System
Monoclinic 
Crystal Habit
Wedge shaped, Pseudo Hexagonal, Striated 
Cleavage
Perfect, Fair, None 
Luster
Vitreous (Glassy) 
Color
colorless, lemon yellow, brown, pale blue 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
6-6.5 
Collection
Don Phillips Collection

Minasragrite

on Patronite - #DP54036
Locality
Minas Ragra, Huayllay dist., Pasco dept., Peru 
Formula
V4+O(SO4)·5H2
Availability
Sold
Size
1.8 x 2.3 x 1.3 cm - Thumbnail 
Tagged
vanadium  
Special Info
Type Locality 

Glassy blue micro crystals in clusters to 1mm on black, sooty, patronite. Besides being extremely rare it is nearly impossible to obtain. It is a two-locality mineral.


Minasragrite

Formula
V4+O(SO4)·5H2
Crystal System
Monoclinic 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
blue 
Streak
light blue 
Class
Monoclinic - Prismatic 
Hardness
1-2 
Collection
Dr. Buford Nichols Collection
Special Info
Type Locality

Noelbensonite

with Rhodonite - #54129
Locality
Woods mine, Darling Co., New South Wales, Australia 
Formula
BaMn3+2Si2O7(OH)2·H2
Availability
Available
Price
$75.00
Size
6 x 5.5 x 4 cm - Sm Cabinet 
Special Info
Type Locality 

Type Locality - brown crystalline Noelbensonite (second and third photos)in red Rhodonite.


Noelbensonite

Formula
BaMn3+2Si2O7(OH)2·H2
Crystal System
Orthorhombic 
Crystal Habit
Blocky, Cryptocrystalline, Crystalline - Fine 
Cleavage
None, None, None 
Luster
Vitreous - Greasy 
Color
dark brown 
Streak
yellow brown 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Uneven 
Hardness
Special Info
Type Locality

Pyrargyrite

#WR54050
Locality
Bote mine, Zacatecas, Mexico 
Formula
Ag3SbS3 
Availability
Sold
Size
6 x 4.5 x 2.5 cm - Sm Cabinet 
Tagged
sulfide , silver  

Easily a top drawer specimen featuring one hundred or so ruby red and silvery crystals of stubby Pyrargyrite crystals from 1 to 6mm. It's in great shape and very presentable. Please note that the ruby red color is best seen under a micro-scope as then you will get the internal reflections of the ruby red.


Pyrargyrite

Formula
Ag3SbS3 
Crystal System
Trigonal 
Crystal Habit
Massive, Crystalline - Poor, Prismatic 
Cleavage
Poor, None, None 
Luster
Sub Metallic 
Color
deep red, red gray 
Streak
cherry red 
Class
Trigonal - Ditrigonal Pyramidal 
Fracture
Brittle - Conchoidal 
Hardness
2.5 
Collection
Willard L. Roberts Collection

Rhodonite

#54115
Locality
Woods mine, Darling Co., New South Wales, Australia 
Formula
Mn2+SiO3 
Availability
Sold
Size
11 x 6 x 3 cm - Cabinet 

Raspberry red crystalline Rhodonite with black Tephroite(?). It is about the best color I have seen for Rhodonite.


Rhodonite

Formula
Mn2+SiO3 
Crystal System
Triclinic 
Crystal Habit
Tabular, Massive, Massive - Granular 
Cleavage
Perfect, Perfect, None 
Luster
Vitreous (Glassy) 
Color
pink, rose red, brownish red, black, yellow 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Uneven 
Hardness
Mineralpedia
View Rhodonite
On Dakota Matrix
Previously Sold Rhodonite
On Dakota Matrix
Other Available Rhodonite
WebMineral
View Rhodonite
Mindat
View Rhodonite

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