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  

Barium Silicates of CA

Friday, 05 April 2024 08:00 AM

Introducing the "Barium Silicates of CA" gallery which is part of our Special Edition galleries. This gallery contains mineral specimens for sale including bigcreekite, gillespite, kampfite, and macdonaldite and more from places like Esquire #7 claim, Big Creek, Fresno Co., California, United States, Esquire #1 claim, Rush Creek, Fresno Co., California, United States.

Bigcreekite

#REW60029
Locality
Esquire #7 claim, Big Creek, Fresno Co., California, United States 
Formula
BaSi2O5·4H2
Availability
Available
Price
$25.00
Size
2.5 x 1.5 x 1.5 cm - Thumbnail 
Tagged
Ba Silicates , barium  
Special Info
Type Locality 

Striated and colorless Bigcreekite.


Bigcreekite

Formula
BaSi2O5·4H2
Crystal System
Orthorhombic 
Crystal Habit
Tabular, Subhedral Crystals 
Cleavage
Perfect, Perfect, None 
Luster
Vitreous - Pearly 
Color
colorless, white 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle 
Hardness
2-3 
Collection
Robert E. Walstrom collection
Special Info
Type Locality

Bigcreekite

#REW60030
Locality
Esquire #7 claim, Big Creek, Fresno Co., California, United States 
Formula
BaSi2O5·4H2
Availability
Available
Price
$30.00
Size
0.7 x 0.5 x 0.4 cm - Thumbnail 
Tagged
Ba Silicates , barium  
Special Info
Type Locality 

This is a small specimen but contains excellent crystallized Bigcreekite in a "veinlet" about 1mm. The Bigcreekite is colorless and striated.

Bigcreekite is only found in California. 

This specimen as well as most of the others in the Special Edition was identified by the expert on the barium-silicates, the late Robert Walstrom.


Bigcreekite

Formula
BaSi2O5·4H2
Crystal System
Orthorhombic 
Crystal Habit
Tabular, Subhedral Crystals 
Cleavage
Perfect, Perfect, None 
Luster
Vitreous - Pearly 
Color
colorless, white 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle 
Hardness
2-3 
Collection
Robert J. Waidler Collection
Special Info
Type Locality

Gillespite

#REW63630
Locality
Esquire #7 claim, Big Creek, Fresno Co., California, United States 
Formula
BaFe2+Si4O10 
Availability
Available
Price
$50.00
Size
3.3 x 2.5 x 2 cm - Miniature 
Tagged
Ba Silicates , barium  

Nice deep to bright red glassy plates of Gillespite to 6mm with Anandite(?).


Gillespite

Formula
BaFe2+Si4O10 
Crystal System
Tetragonal 
Crystal Habit
Aggregates 
Cleavage
Good, Good, Poor 
Luster
Vitreous (Glassy) 
Color
red 
Class
Tetragonal - Ditetragonal Dipyramidal 
Fracture
Brittle 
Hardness
Collection
Robert E. Walstrom collection

Gillespite

#REW63873
Locality
Esquire #7 claim, Big Creek, Fresno Co., California, United States 
Formula
BaFe2+Si4O10 
Availability
Available
Price
$35.00
Size
4.5 x 2.5 x 2 cm - Miniature 
Tagged
Ba Silicates , barium  

Bright red crystals of Gillespite to 1mm in Anandite.


Gillespite

Formula
BaFe2+Si4O10 
Crystal System
Tetragonal 
Crystal Habit
Aggregates 
Cleavage
Good, Good, Poor 
Luster
Vitreous (Glassy) 
Color
red 
Class
Tetragonal - Ditetragonal Dipyramidal 
Fracture
Brittle 
Hardness
Collection
Robert E. Walstrom collection

Kampfite

#REW60388
Locality
Esquire #1 claim, Rush Creek, Fresno Co., California, United States 
Formula
Ba12(Si11Al5)O31(CO3)8Cl5 
Availability
Available
Price
$45.00
Size
3 x 2 x .06 cm - Thumbnail 
Tagged
Ba Silicates , barium  
Special Info
Type Locality 

A string of bluish grains along a 6mm stretch of Kampfite in Sanbornite matrix.


Kampfite

Formula
Ba12(Si11Al5)O31(CO3)8Cl5 
Crystal System
Monoclinic 
Crystal Habit
Irregular Grains 
Cleavage
Good, None, None 
Luster
Vitreous (Glassy) 
Color
light blue gray 
Streak
white 
Class
Monoclinic - Domatic 
Fracture
Brittle - Uneven 
Hardness
Collection
Robert E. Walstrom collection
Special Info
Type Locality
Mineralpedia
View Kampfite
On Dakota Matrix
Previously Sold Kampfite
On Dakota Matrix
Other Available Kampfite
WebMineral
View Kampfite
Mindat
View Kampfite

Macdonaldite

#REW63854
Locality
Esquire #1 claim, Rush Creek, Fresno Co., California, United States 
Formula
BaCa4Si16O36(OH)2·10H2
Availability
Available
Price
$85.00
Size
3 x 2.5 x 2 cm - Thumbnail 
Tagged
Ba Silicates , bariium  
Special Info
Type Locality 

Radiating Macdonaldite crystals partially replaced by opal. Macdonaldite is a late stage mineral at the barium silicate deposits. It is a product of Sanbornite weathering. Nonetheless it is still a very rare mineral and occurs in only one deposit outside of California.


Macdonaldite

Formula
BaCa4Si16O36(OH)2·10H2
Crystal System
Orthorhombic 
Crystal Habit
Acicular 
Cleavage
Perfect, Good, Indistinct 
Luster
Vitreous - Silky 
Color
colorless, white 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Hardness
3.5-4 
Collection
Robert E. Walstrom collection
Special Info
Type Locality

All photos by Dakota Matrix and are Copyrighted © and may not be used without permission. Copyright © 2024 - Dakota Matrix Minerals, Inc. Privacy | Terms & Conditions | Site Map