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Rare & Systematic Minerals

Friday, 18 June 2021 05:00 PM

Introducing the "Rare & Systematic Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including anatase, beryl, bournonite, caryinite, caryopilite, and clinocervantite and more from places like Topcha locality, east slope of Polar Urals, Russia, Carnaíba dist., Pindobaçu, Bahia, Brazil, Quiruvilca mine, Santiago de Chuco prov., La Libertad dept., Peru, Långban, Filipstad, Värmland, Sweden, and Tafone mine, Grosetto Province, Tuscany, Italy.

Anatase

on Quartz - #AH55971
Locality
Topcha locality, east slope of Polar Urals, Russia 
Formula
TiO2 
Availability
Available
Price
$40.00
Size
4.5 x 3 x 2.1 cm - Miniature 

Sharp deep blue crystal to 7mm.


Anatase

Formula
TiO2 
Crystal System
Tetragonal 
Crystal Habit
Pyramidal, Tabular 
Cleavage
Perfect, Distinct, None 
Luster
Adamantine - Resinous 
Color
black, reddish brown, yellowish brown, dark blue, gray 
Streak
pale yellowish white 
Class
Tetragonal - Ditetragonal Dipyramidal 
Fracture
Conchoidal 
Hardness
5.5-6 
Collection
Arnold G Hampson Collection
Mineralpedia
View Anatase
On Dakota Matrix
Previously Sold Anatase
On Dakota Matrix
Other Available Anatase
WebMineral
View Anatase
Mindat
View Anatase

Beryl

var. emerald with Molybdenite - #BN55952
Locality
Carnaíba dist., Pindobaçu, Bahia, Brazil 
Formula
Be3Al2Si6O18 
Availability
Sold
Size
4 x 4 x 2 cm - Miniature 
Tagged
beryllium  

Beryl, variety emerald, with good green color but no gemmy portions. The curious and interesting thing here is the Molybdenite association. 


Beryl

Formula
Be3Al2Si6O18 
Crystal System
Hexagonal 
Crystal Habit
Crystalline - Coarse, Prismatic, Columnar 
Cleavage
Imperfect, None, None 
Luster
Vitreous - Resinous 
Color
green, blue, yellow, colorless, pink 
Streak
white 
Class
Hexagonal - Dihexagonal Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
7.5-8 
Collection
Dr. Buford Nichols Collection
Mineralpedia
View Beryl
On Dakota Matrix
Previously Sold Beryl
On Dakota Matrix
Other Available Beryl
WebMineral
View Beryl
Mindat
View Beryl

Bournonite

with Sphalerite - #AH55949
Locality
Quiruvilca mine, Santiago de Chuco prov., La Libertad dept., Peru 
Formula
CuPbSbS3 
Availability
Sold
Size
6 x 4 x 2 cm - Sm Cabinet 
Tagged
sulfide , copper  

Excellent 3mm cogwheel twinned Bournonite crystals with black Sphalerite.


Bournonite

Formula
CuPbSbS3 
Crystal System
Orthorhombic 
Crystal Habit
Platy, Pseudo Cubic, Cog-wheel 
Cleavage
Imperfect, None, None 
Luster
Metallic 
Color
gray, black, steel gray 
Streak
gray 
Class
Orthorhombic - Dipyramidal 
Fracture
Sub Conchoidal 
Hardness
Collection
Arnold G Hampson Collection

Caryinite

#PD55969
Locality
Långban, Filipstad, Värmland, Sweden 
Formula
(Na,Pb)(Ca,Na)CaMn2+2(AsO4)3 
Availability
Sold
Size
5.5 x 6 x 2.5 cm - Sm Cabinet 
Special Info
Type Locality 

Dark orange sections of Carynite to 1cm.


Caryinite

Formula
(Na,Pb)(Ca,Na)CaMn2+2(AsO4)3 
Crystal System
Monoclinic 
Crystal Habit
Cleaveable, Massive - Granular 
Cleavage
Distinct, Distinct, None 
Luster
Greasy (Oily) 
Color
brown, yellow brown 
Streak
light brown 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Uneven 
Hardness
Collection
Don Phillips Collection
Special Info
Type Locality
Mineralpedia
View Caryinite
On Dakota Matrix
Previously Sold Caryinite
On Dakota Matrix
Other Available Caryinite
WebMineral
View Caryinite
Mindat
View Caryinite

Caryopilite

with Brandtite & Magnetite - #PD55962
Locality
Långban, Filipstad, Värmland, Sweden 
Formula
(Mn2+)3Si2O5(OH)4 
Availability
Sold
Size
5.5 x 3.5 x 2.5 cm - Sm Cabinet 
Special Info
Type Locality 

Good rich coverage of beady black or dark grey Caryopilite with a 9mm collerless Brandtite crystal on Magnetite matrix.


Caryopilite

Formula
(Mn2+)3Si2O5(OH)4 
Crystal System
Monoclinic 
Crystal Habit
Pseudo Hexagonal, Platy, Massive 
Cleavage
Good, None, None 
Luster
Vitreous (Glassy) 
Color
reddish brown, yellow, greenish brown, orange brown 
Streak
light brown 
Class
Monoclinic 
Hardness
3-3.5 
Collection
Don Phillips Collection
Special Info
Type Locality

Clinocervantite

with Valentinite - #55932
Locality
Tafone mine, Grosetto Province, Tuscany, Italy 
Formula
Sb3+Sb5+O4 
Availability
Sold
Size
5 x 3.5 x 3 cm - Miniature 
Special Info
Type Locality 

Tiny, less than 0.2mm, thin bladed colorless Clinocervantite crystals lining vugs with several acicular crystals of Valentinite to 3mm. Clinocervantite is a very rare antimony oxide found in only three localties worldwide.


Clinocervantite

Formula
Sb3+Sb5+O4 
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Microscopic Crystals 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
colorless 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Uneven 
Hardness
Special Info
Type Locality

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