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Mixed Minerals

Sunday, 20 November 2022 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including almandine, baryte, bjarebyite, calcioferrite, cassiterite, and celestine and more from places like Garnet Hill, White Pine Co., Nevada, United States, Jinkouhe, Maoniuping, Sichuan prov., China, Palermo mine, Groton, Grafton Co., New Hampshire, United States, Klemms Quarry, Moculta, South Australia, Australia, Yaogangxian mine, Chenzhou, Hunan prov., China, and Maybee, Monroe Co., Michigan, United States.

Almandine

#59736
Locality
Garnet Hill, White Pine Co., Nevada, United States 
Formula
Fe2+3Al2(SiO4)3 
Availability
Sold
Size
7.5 x 3 x 4 cm - Sm Cabinet 

This is one of the better specimens I've seen from this locality. There are about 15 deep red well-formed Almandine crystals to 6mm. Usually you see one or two crystals on matrix.


Almandine

Formula
Fe2+3Al2(SiO4)3 
Crystal System
Isometric 
Crystal Habit
Equant crystals, rounded grains, typically well-formed dodecahedra or trapezohedra 
Cleavage
None 
Luster
Vitreous - Resinous 
Color
brown, brownish red, red, black, black red 
Streak
white 
Class
Isometric - Hexoctahedral 
Fracture
Brittle - Conchoidal 
Hardness
7-8 
Mineralpedia
View Almandine
On Dakota Matrix
Previously Sold Almandine
On Dakota Matrix
Other Available Almandine
WebMineral
View Almandine
Mindat
View Almandine

Baryte

#59758
Locality
Jinkouhe, Maoniuping, Sichuan prov., China 
Formula
BaSO4 
Availability
Sold
Size
7.5 x 5 x 4 cm - Sm Cabinet 

Amber colored and zoned crystals, sharply terminated. One side of the crystals are frosted with a fine coating of a second generation of colorless Baryte. Neat specimen for its many perios of crystal growth.


Baryte

Formula
BaSO4 
Crystal System
Orthorhombic 
Crystal Habit
Tabular, Prismatic, Massive - Fibrous 
Cleavage
Perfect, Perfect, Imperfect 
Luster
Vitreous (Glassy) 
Color
white, yellowish white, grayish white, brownish white, dark brown 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Uneven 
Hardness
3-3.5 
Collection
Arnold G Hampson Collection
Mineralpedia
View Baryte
On Dakota Matrix
Previously Sold Baryte
On Dakota Matrix
Other Available Baryte
WebMineral
View Baryte
Mindat
View Baryte

Bjarebyite

#59754
Locality
Palermo mine, Groton, Grafton Co., New Hampshire, United States 
Formula
BaMn2+2Al2(PO4)3(OH)3 
Availability
Sold
Size
3.5 x 3 x 2.2 cm - Miniature 
Tagged
phosphate , pegmatite mineral  
Special Info
Type Locality 

Pretty much just a cleavable chunk but thought someone would like it since it is a rare phosphate found in 5 or 6 localities according to Mindat. 


Bjarebyite

Formula
BaMn2+2Al2(PO4)3(OH)3 
Crystal System
Monoclinic 
Crystal Habit
Acicular, Striated, Prismatic 
Cleavage
Perfect, Perfect, None 
Luster
Subadamantine 
Color
emerald green 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
Special Info
Type Locality

Calcioferrite

#BN59749
Locality
Klemms Quarry, Moculta, South Australia, Australia 
Formula
Ca4MgFe3+4(PO4)6(OH)4·12H2
Availability
Available
Price
$85.00
Size
4.5 x 2.5 x 2 cm - Miniature 
Tagged
phosphate  

Two light yellow crystal groups to 0.5mm. These are very nice crystals and look a little like Montgomeryite. Calcioferrite is found in only five countries and considered very rare. 


Calcioferrite

Formula
Ca4MgFe3+4(PO4)6(OH)4·12H2
Crystal System
Monoclinic 
Crystal Habit
Foliated, Reniform 
Cleavage
Perfect, Very Good, None 
Luster
Pearly 
Color
greenish yellow, yellow, yellow green, yellowish white 
Streak
yellowish white 
Class
Monoclinic - Sphenoidal 
Fracture
Brittle 
Hardness
2.5 
Collection
Dr. Buford Nichols Collection

Cassiterite

#AH59716
Locality
Yaogangxian mine, Chenzhou, Hunan prov., China 
Formula
SnO2 
Availability
Available
Price
$50.00
Size
6 x 3 x 1.5 cm - Sm Cabinet 

Nice miniature specimen of Cassiterite. The largest crystal is 1cm with several smaller. Each crystal is well-defined with a nice internal brown color.


Cassiterite

Formula
SnO2 
Crystal System
Tetragonal 
Crystal Habit
Prismatic, Massive, Botryoidal 
Cleavage
Perfect, Indistinct, None 
Luster
Adamantine 
Color
brown, brownish black, colorless, green, gray 
Streak
brownish white 
Class
Tetragonal - Ditetragonal Dipyramidal 
Fracture
Irregular 
Hardness
6-7 
Collection
Arnold G Hampson Collection

Celestine

#AH59750
Locality
Maybee, Monroe Co., Michigan, United States 
Formula
SrSO4 
Availability
Sold
Size
7 x 5.5 x 4 cm - Sm Cabinet 

Faint blue, sharp, lustrous crystals to 4mm. It is more usual to see Celestine crystals from this deposit at a much larger scale. But even at this scale, it is fascinating to look at the many crystal forms on all the terminations. You will find this piece to be very enjoyable in-hand or under the scope.


Celestine

Formula
SrSO4 
Crystal System
Orthorhombic 
Crystal Habit
Crystalline - Coarse, Massive, Granular 
Cleavage
Perfect, Good, None 
Luster
Vitreous (Glassy) 
Color
blue, brown, colorless, green, gray 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
3-3.5 
Collection
Arnold G Hampson Collection
Mineralpedia
View Celestine
On Dakota Matrix
Previously Sold Celestine
On Dakota Matrix
Other Available Celestine
WebMineral
View Celestine
Mindat
View Celestine

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