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Rare Minerals

Monday, 20 January 2025 06:00 PM

Introducing the "Rare Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including blatterite, christofschäferite-(ce), dietzeite, kamaishilite, legrandite, and leightonite and more from places like Kitteln, Nordmark, Sweden, Wingertsberg, Eifel Volcanic Fields, Germany, Taltal, Antofagasta Prov., Antofagasta, Chile, Kamaishi mine, Kamaishi City, Iwate, Japan, Mina Ojuela, Mapimi, Durango, Mexico, and Salvadora Mine, Tocopilla prov., Antofagasta, Chile.

Blatterite

#BAC62509
Locality
Kitteln, Nordmark, Sweden 
Formula
Sb5+3Mn3+9Mn2+35(BO3)16O32 
Availability
Sold
Size
2 x 2 x 1 cm - Thumbnail 

Several black needle-like crystals embedded in matrix.


Blatterite

Formula
Sb5+3Mn3+9Mn2+35(BO3)16O32 
Crystal System
Orthorhombic 
Crystal Habit
Prismatic 
Cleavage
Perfect, None, None 
Luster
Sub Metallic 
Color
black 
Streak
brown 
Class
Orthorhombic - Dipyramidal 
Hardness
Collection
William & Anne Cook Collection

Christofschäferite-(Ce)

#BAC62508a
Locality
Wingertsberg, Eifel Volcanic Fields, Germany 
Formula
Ce3CaMnTiFe(3+)Ti2(Si2O7)2O8 
Availability
Sold
Size
0.3 x 0.3 x 0.2 cm - Thumbnail 
Tagged
REE mineral  
Special Info
Type Locality 

Jet black like glossy coal in mal-formed crystals not like the nice Mindat photos. Ex. Dr. Jaroslav Hyrsl specimen. It is a two-locality mineral, this being the type.


Collection
William & Anne Cook Collection
Special Info
Type Locality

Dietzeite

#CS65306
Locality
Taltal, Antofagasta Prov., Antofagasta, Chile 
Formula
Ca2(IO3)2CrO4·H2
Availability
Sold
Size
2.7 x 2.3 x 1.8 cm - Thumbnail 

Golden yellow, sugary, microcrystals less than 0.3mm in size. Very rare mineral and occurs chiefly in evaporitic arid environments with salts.


Dietzeite

Formula
Ca2(IO3)2CrO4·H2
Crystal System
Monoclinic 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
golden yellow 
Streak
light yellow 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
3.5 
Mineralpedia
View Dietzeite
On Dakota Matrix
Previously Sold Dietzeite
On Dakota Matrix
Other Available Dietzeite
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View Dietzeite
Mindat
View Dietzeite
SOLD
Kamaishilite - BAC65333
Kamaishilite - BAC65333

Kamaishilite

#BAC65333
Locality
Kamaishi mine, Kamaishi City, Iwate, Japan 
Formula
Ca2(SiAl2)O6(OH)2 
Availability
Sold
Size
0.5 x 0.4 x 0.2 cm - Thumbnail 

Colorless grains to less than 0.2mm in a greenish unknown matrix. 


Kamaishilite

Formula
Ca2(SiAl2)O6(OH)2 
Crystal System
Tetragonal 
Crystal Habit
Microscopic Crystals 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
colorless 
Streak
white 
Class
Tetragonal 
Hardness
Collection
William & Anne Cook Collection

Legrandite

with Adamite - #BAC65349
Locality
Mina Ojuela, Mapimi, Durango, Mexico 
Formula
Zn2AsO4(OH)·H2
Availability
Available
Price
$175.00
Size
6 x 4.5 x 5 cm - Sm Cabinet 
Tagged
arsenate  

Adamite with Legrandite is not a typical association. The Adamite on this specimen light yellow with colorless tips. The Legrandite crystals are up to 4mm.


Legrandite

Formula
Zn2AsO4(OH)·H2
Crystal System
Monoclinic 
Crystal Habit
Crystalline - Fine, Prismatic 
Cleavage
Imperfect, None, None 
Luster
Vitreous (Glassy) 
Color
yellow, yellowish orange 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Conchoidal 
Hardness
4-5 
Collection
William & Anne Cook Collection

Leightonite

#BAC65300
Locality
Salvadora Mine, Tocopilla prov., Antofagasta, Chile 
Formula
K2Ca2Cu(SO4)4·2H2
Availability
Sold
Size
5 x 5 x 2.5 cm - Miniature 
Tagged
copper  

Thin platey, bluish green translucent crystals to 1.5mm. Excellent piece, which you don't see on the market these days.


Leightonite

Formula
K2Ca2Cu(SO4)4·2H2
Crystal System
Monoclinic 
Crystal Habit
Prismatic 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
blue green, light blue 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
Collection
William & Anne Cook Collection

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