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 graftonite, hogtuvaite, homilite, kinoite, liebigite, and londonite and more from places like Grafton, Grafton Co., New Hampshire, United States, Hogtuva, Rana, Nordland, Norway, Stokkøya, Langesundsfjorden, Larvik, Vestfold, Norway, Christmas mine, Gila Co., Arizona, United States, Midnite mine, Stevens Co., Washington, United States, and Antsongomvato mine, Betroka dist., Antananarivo, Madagascar.

Graftonite

with Heterosite - #BN52286
Locality
Grafton, Grafton Co., New Hampshire, United States 
Formula
(Fe2+,Mn2+,Ca)3(PO4)2 
Availability
Sold
Size
5 x 5 x 1.5 cm - Miniature 
Tagged
phosphate , pegmatite mineral  

Parallel layers of bleached Graftonite and Purpurite-Heterosite.


Graftonite

Formula
(Fe2+,Mn2+,Ca)3(PO4)2 
Crystal System
Monoclinic 
Crystal Habit
Massive - Granular, Lamellar 
Cleavage
Perfect, None, None 
Luster
Vitreous - Greasy 
Color
brown, pink, dark brown, reddish brown 
Streak
pale pink 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
Collection
Dr. Buford Nichols Collection

Hogtuvaite

#DP52205
Locality
Hogtuva, Rana, Nordland, Norway 
Formula
Ca4(Fe2+6Fe3+6)O4[Si8Be2Al2O36
Availability
Sold
Size
5 x 4 x 4 cm - Miniature 
Tagged
beryllium , pegmatite mineral  

Black vitrous crystal masses in matrix.


Hogtuvaite

Formula
Ca4(Fe2+6Fe3+6)O4[Si8Be2Al2O36
Crystal System
Triclinic 
Luster
Subadamantine 
Color
black 
Class
Triclinic - Pinacoidal 
Hardness
5.5 
Collection
Don Phillips Collection
SOLD
Homilite - 50222
Homilite - 50222

Homilite

#50222
Locality
Stokkøya, Langesundsfjorden, Larvik, Vestfold, Norway 
Formula
Ca2Fe2+B2Si2O10 
Availability
Sold
Size
1.2 x 0.8 x 0.6 cm - Thumbnail 
Special Info
Type Locality 
Special Info
XRD Confirmed 

Greenish black rare borosilicate showing a small striated face of a crystal.


Homilite

Formula
Ca2Fe2+B2Si2O10 
Crystal System
Monoclinic 
Crystal Habit
Tabular 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
black, blackish brown 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
Special Info
Type Locality
Special Info
XRD Confirmed
On Dakota Matrix
Previously Sold Homilite
On Dakota Matrix
Other Available Homilite
WebMineral
View Homilite
Mindat
View Homilite

Kinoite

#AH52239
Locality
Christmas mine, Gila Co., Arizona, United States 
Formula
Ca2Cu2Si3O10·2H2
Availability
Sold
Size
7.5 x 7 x 3 cm - Sm Cabinet 
Tagged
copper  

Wonderful deep blue single crystals covering face with minor green Gilalite.


Kinoite

Formula
Ca2Cu2Si3O10·2H2
Crystal System
Monoclinic 
Cleavage
Perfect, Distinct, Distinct 
Luster
Vitreous (Glassy) 
Color
azure blue 
Streak
bluish white 
Class
Monoclinic - Prismatic 
Hardness
Collection
Arnold G Hampson Collection
Mineralpedia
View Kinoite
On Dakota Matrix
Previously Sold Kinoite
On Dakota Matrix
Other Available Kinoite
WebMineral
View Kinoite
Mindat
View Kinoite

Liebigite

#AH52240
Locality
Midnite mine, Stevens Co., Washington, United States 
Formula
Ca2(UO2)(CO3)3·11H2
Availability
Sold
Size
4 x 3.5 x 2 cm - Miniature 
Tagged
carbonate  

A rich specimen full of platy yellow crystals of Liebigite.


Liebigite

Formula
Ca2(UO2)(CO3)3·11H2
Crystal System
Orthorhombic 
Cleavage
Distinct, None, None 
Luster
Vitreous - Pearly 
Color
green, yellow green 
Streak
yellow white 
Class
Orthorhombic - Pyramidal 
Fracture
Brittle - Uneven 
Hardness
2.5-3 
Collection
Arnold G Hampson Collection
Mineralpedia
View Liebigite
On Dakota Matrix
Previously Sold Liebigite
On Dakota Matrix
Other Available Liebigite
WebMineral
View Liebigite
Mindat
View Liebigite

Londonite

#48440
Locality
Antsongomvato mine, Betroka dist., Antananarivo, Madagascar 
Formula
CsBe5Al4B11O28 
Availability
Sold
Size
3.5 x 2 x 2 cm - Miniature 
Tagged
beryllium , pegmatite mineral  
Special Info
XRD Confirmed 
Special Info
EDS Confirmed 

A suberb, yellow, gemmy Londonite crystal to 5m across. Comes with a signed label by Dr. David London.


Londonite

Formula
CsBe5Al4B11O28 
Crystal System
Isometric 
Crystal Habit
Euhedral Crystals 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
colorless, white, yellow 
Streak
white 
Class
Isometric - Hextetrahedral 
Fracture
Brittle - Conchoidal 
Hardness
Special Info
XRD Confirmed
Special Info
EDS Confirmed
Mineralpedia
View Londonite
On Dakota Matrix
Previously Sold Londonite
On Dakota Matrix
Other Available Londonite
WebMineral
View Londonite
Mindat
View Londonite

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