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Mixed Minerals

Sunday, 24 June 2018 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including forsterite, nickeline, paravauxite, sampleite, tavorite, and uvarovite and more from places like Jacupiranga mine, Cajati, São Paulo, Brazil, Nipissing mine, Cobalt, Timiskaming dist., Ontario, Canada, Llallagua, Bolivia, Endeavor 26, North Parkes Mine, New South Wales, Australia, Tip Top mine, Custer Co., South Dakota, United States, and Jacksonville dist., Mother Lode Belt, Tuolumne Co., California, United States.

Forsterite

with Magnetite - #PD49223
Locality
Jacupiranga mine, Cajati, São Paulo, Brazil 
Formula
Mg2SiO4 
Availability
Available
Price
$75.00
Size
9 x 6 x 4 cm - Sm Cabinet 

Yellowish, dull, equant Forsterite to 2cm with dull black octahedral Magnetite to 2.5cm.


Forsterite

Formula
Mg2SiO4 
Crystal System
Orthorhombic 
Crystal Habit
Crystalline - Fine, Tabular 
Cleavage
Good, Distinct, None 
Luster
Vitreous (Glassy) 
Color
colorless, green, yellow, yellow green, white 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Conchoidal 
Hardness
6-7 
Collection
Don Phillips Collection

Nickeline

#RW49224
Locality
Nipissing mine, Cobalt, Timiskaming dist., Ontario, Canada 
Formula
NiAs 
Availability
Available
Price
$125.00
Size
12 x 9 x 2.5 cm - Cabinet 
Tagged
nickel  

Large crystalline mass of brassy gold Nickeline. It is a cut flat on one side to show the many veinlets which have penetrated the original rock.


Nickeline

Formula
NiAs 
Crystal System
Hexagonal 
Crystal Habit
Massive, Reniform, Columnar 
Cleavage
Imperfect, Imperfect, None 
Luster
Metallic 
Color
lead gray, grayish, copper, black 
Streak
brownish black 
Class
Hexagonal - Dihexagonal Dipyramidal 
Fracture
Uneven 
Hardness
5.5 
Collection
Robert J. Waidler Collection
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Paravauxite

with Vauxite - #BN49239
Locality
Llallagua, Bolivia 
Formula
Fe2+Al2(PO4)2(OH)2·8H2
Availability
Available
Price
$60.00
Size
5 x 2.5 x 1 cm - Miniature 
Tagged
phosphate  

Light white to faint green, lustrous prismatic crystals to 1.1cm with minor blue Vauxite.


Paravauxite

Formula
Fe2+Al2(PO4)2(OH)2·8H2
Crystal System
Triclinic 
Cleavage
Perfect, None, None 
Luster
Vitreous - Pearly 
Color
colorless, greenish white, light greenish white 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Brittle - Conchoidal 
Hardness
Collection
Dr. Buford Nichols Collection

Sampleite

#RW49137
Locality
Endeavor 26, North Parkes Mine, New South Wales, Australia 
Formula
NaCaCu5(PO4)4Cl·5H2
Availability
Available
Price
$65.00
Size
7 x 5 x 1.5 cm - Sm Cabinet 
Tagged
phosphate , copper  

Flashy neon blue patches of radial Sampleite crystals to 5mm across.


Sampleite

Formula
NaCaCu5(PO4)4Cl·5H2
Crystal System
Orthorhombic 
Crystal Habit
Rosette, Lath, Aggregates 
Cleavage
Perfect, Good, Good 
Luster
Pearly 
Color
bluish green, light blue 
Streak
bluish white 
Class
Orthorhombic - Dipyramidal 
Hardness
Collection
Robert J. Waidler Collection
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Tavorite

with Hureaulite, Leucophosphite, Ushkovite & Bermanite - #BN49295
Locality
Tip Top mine, Custer Co., South Dakota, United States 
Formula
LiFe3+PO4(OH) 
Availability
Available
Price
$275.00
Size
9.5 x 7.5 x 5.5 cm - Cabinet 
Tagged
phosphate , pegmatite mineral , lithium  

Larger specimen of pinkish red Hureaulite in masses and crystals to 3mm with cavities filled with sugary lime green Tavorite and clusters of well-defined, excellent crystals in groups to 2mm. These are fabulous crystals of Tavorite, some of the best around. At the Tip Top mine, Tavorite is uncommon and crystals are very rare. I'm not sure if there is a better locality. Scattered around the cavaties to a lessor degree are tiny less than 1mm opaque yellow-orange Ushkovite crystals, deep red Bermanite and purple Leucophosphate crystals.


Tavorite

Formula
LiFe3+PO4(OH) 
Crystal System
Triclinic 
Crystal Habit
Crystalline - Fine 
Cleavage
Distinct, Distinct, Distinct 
Luster
Vitreous (Glassy) 
Color
grass green, greenish yellow, yellow green, yellow 
Streak
light green 
Class
Triclinic 
Hardness
Collection
Dr. Buford Nichols Collection
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Uvarovite

with Clinochlore - #49078
Locality
Jacksonville dist., Mother Lode Belt, Tuolumne Co., California, United States 
Formula
Ca3Cr2(SiO4)3 
Availability
Available
Price
$175.00
Size
6 x 4 x 2.5 cm - Sm Cabinet 

Good coverage of deep emerald green Uvarovite crystals to 1mm with purple chromium Clinichlore.


Uvarovite

Formula
Ca3Cr2(SiO4)3 
Crystal System
Isometric 
Crystal Habit
Crystalline - Fine, Crystalline - Fine, Lamellar 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
green 
Streak
white 
Class
Isometric - Hexoctahedral 
Fracture
Brittle 
Hardness
6.5-7 
Mineralpedia
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