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1 item @ $40.00  

Beryllium Minerals

Friday, 21 June 2024 06:00 PM

Minerals containing beryllium can be some of the rarest on earth. If you like rare minerals this is a must see Special Edition.

Euclase

#61894
Locality
Goias, Brazil 
Formula
BeAlSiO4(OH) 
Availability
Sold
Size
0.3 x 0.2 x 0.1 cm - Thumbnail 
Tagged
beryllium  
Special Info
Gem Quality 

Nice blue faceted crystal of Euclase mounted in micromount box.


Euclase

Formula
BeAlSiO4(OH) 
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Massive - Fibrous, Striated 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
blue, colorless, white, light blue, light green 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
7.5 
Special Info
Gem Quality
Mineralpedia
View Euclase
On Dakota Matrix
Previously Sold Euclase
On Dakota Matrix
Other Available Euclase
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Euclase

#BAC64242
Locality
Goias, Brazil 
Formula
BeAlSiO4(OH) 
Availability
Sold
Size
1.5 x 1 x 0.2 cm - Thumbnail 
Tagged
beryllium  
Special Info
Gem Quality 

Interesting color zoned Euclase crystal. 


Euclase

Formula
BeAlSiO4(OH) 
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Massive - Fibrous, Striated 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
blue, colorless, white, light blue, light green 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
7.5 
Collection
William & Anne Cook Collection
Special Info
Gem Quality
Mineralpedia
View Euclase
On Dakota Matrix
Previously Sold Euclase
On Dakota Matrix
Other Available Euclase
WebMineral
View Euclase
Mindat
View Euclase

Eudidymite

with Analcime & Aegerine - #42162
Locality
Poudrette quarry, Mont Saint-Hilaire, Montérégie, Québec, Canada 
Formula
Na2Be2Si6O15·H2
Availability
Available
Price
$40.00
Size
4.5 x 4 x 3.5 cm - Miniature 
Tagged
beryllium  

Colorless crystals with triangular shapes associated Analcime and Aegerine.


Eudidymite

Formula
Na2Be2Si6O15·H2
Crystal System
Monoclinic 
Crystal Habit
Twinning Common, Tabular 
Cleavage
Good, Good, None 
Luster
Vitreous (Glassy) 
Color
blue, colorless, violet, gray, yellow 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness

Genthelvite

with Chiavennite - #BAC62149
Locality
Tvedalen, Larvik, Vestfold, Norway 
Formula
Be3Zn4(SiO4)3
Availability
Sold
Size
3.8 x 2.3 x 2 cm - Miniature 
Tagged
beryllium  

Excellent red Genthelvite crystals to 1mm with associated orange rosettes of Chiavennite.


Genthelvite

Formula
Be3Zn4(SiO4)3
Crystal System
Isometric 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
blue green, brown, colorless, green, yellow 
Streak
white 
Class
Isometric - Hextetrahedral 
Fracture
Brittle - Uneven 
Hardness
6-6.5 
Collection
William & Anne Cook Collection

Greifensteinite

with Gormanite & Eosphorite - #BAC64256
Locality
Linopolis, Divino das Larajeiras, Minas Gerais, Brazil 
Formula
Ca2Fe2+5Be4(PO4)6(OH)4·6H2
Availability
Sold
Size
3.3 x 1.5 x 1.8 cm - Miniature 
Tagged
phosphate , beryllium , pegmatite mineral  

Tannish sheaf-like bundles of Greifensteinite to 6mm with green fibrous Gormanite.


Greifensteinite

Formula
Ca2Fe2+5Be4(PO4)6(OH)4·6H2
Crystal System
Monoclinic 
Crystal Habit
Radial, Aggregates 
Cleavage
Parting, None, None 
Luster
Vitreous (Glassy) 
Color
dark olive green 
Streak
green 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Uneven 
Hardness
4.5 
Collection
William & Anne Cook Collection

Guimaraesite

over Zanaziite - #BAC63253
Locality
Piauí Valley, Taquaral, Minas Gerais, Brazil 
Formula
Ca2Zn5Be4(PO4)6(OH)4·6H2
Availability
Sold
Size
0.6 x 0.4 x 0.2 cm - Thumbnail 
Tagged
phosphate , beryllium , pegmatite mineral  

Rounded cyrstal balls of Guimaraesite with bladed Zanaziite.


Guimaraesite

Formula
Ca2Zn5Be4(PO4)6(OH)4·6H2
Crystal System
Monoclinic 
Crystal Habit
Prismatic 
Luster
Vitreous (Glassy) 
Color
brown 
Class
Monoclinic - Prismatic 
Hardness
Collection
William & Anne Cook Collection

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