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Mixed Minerals

Friday, 09 October 2020 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including fluorite, gold, horvathite-(y), hydroxylherderite, juanite, and lazarenkoite and more from places like Denton mine, Hardin Co., Illinois, United States, Cornucopia mine, Baker Co., Oregon, United States, Mont Saint-Hilaire, Rouville Co., Quebec, Canada, Palermo mine, Groton, Grafton Co., New Hampshire, United States, Iron mine, Kovdor Massif, Kola Peninsula, Russia, and Khovu-Aksy, Tuva, Siberia, Russia.

Fluorite

with Calcite - #AH54236
Locality
Denton mine, Hardin Co., Illinois, United States 
Formula
CaF2 
Availability
Sold
Size
8.5 x 8 x 5.5 cm - Sm Cabinet 

Excellent specimen for display and to marvel over. The Fluorite is color-zoned with dark purple edges and a yellow core. It transmits light quite well to show the colors. The 4-5mm Calcite crystals have a Malachite staining. One crystal is cleaved, but does not distract from the overall beauty.


Fluorite

Formula
CaF2 
Crystal System
Isometric 
Crystal Habit
Crystalline - Coarse, Massive - Granular, Disseminated 
Cleavage
Three perfect, octahedral cleavages. 
Luster
Vitreous (Glassy) 
Color
purple, clear, yellow, green, red, blue 
Streak
white 
Geological Setting
Occurs in a wide range of geologic environments including low temperature Missississippi Valley lead-zinc deposits, hydrothermal gold deposits, Alpine cleft metamorphic environments  
Class
Isometric - Hexoctahedral 
Fracture
Uneven 
Hardness
Collection
Arnold G Hampson Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Fluorite
On Dakota Matrix
Other Available Fluorite
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Mindat
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Gold

#AH53160
Locality
Cornucopia mine, Baker Co., Oregon, United States 
Formula
Au 
Availability
Sold
Size
5 x 2.5 x 1.5 cm - Miniature 
Tagged
native element  

A very rich specimen with leaf gold throughout.


Gold

Formula
Au 
Crystal System
Isometric 
Crystal Habit
Arborescent, Platy, Granular 
Cleavage
None, None, None 
Luster
Metallic 
Color
yellow, pale yellow, orange, yellow white, reddish white 
Streak
yellow 
Class
Isometric - Hexoctahedral 
Fracture
Hackly 
Hardness
2.5-3 
Collection
Arnold G Hampson Collection
Mineralpedia
View Goldmanite
On Dakota Matrix
Previously Sold Gold
On Dakota Matrix
Other Available Gold
WebMineral
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Mindat
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Horvathite-(Y)

#40979
Locality
Mont Saint-Hilaire, Rouville Co., Quebec, Canada 
Formula
NaY(CO3)F2 
Availability
Available
Price
$125.00
Size
5 x 2.5 x 2 cm - Miniature 
Tagged
carbonate , REE mineral  
Special Info
Type Locality 

It was hard to capture all the crystals of Horvathite in this specimen. But they are honey colored, tabular and peculiar looking to 2mm. In association are light pink Rhodochrosite crystals. Horvathite-(Y) is not only a REE mineral but it is only found at MSH and the Saint-Amable sill in Quebec.


Horvathite-(Y)

Formula
NaY(CO3)F2 
Crystal System
Orthorhombic 
Crystal Habit
Tabular 
Cleavage
Very Good, Good, None 
Luster
Vitreous (Glassy) 
Color
colorless, pale yellow, pale beige 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Uneven 
Hardness
Special Info
Type Locality

Hydroxylherderite

with Moraesite - #BN54238
Locality
Palermo mine, Groton, Grafton Co., New Hampshire, United States 
Formula
CaBePO4(OH) 
Availability
Sold
Size
7 x 3.5 x 4.5 cm - Sm Cabinet 
Tagged
phosphate , pegmatite mineral  

Nice tabular crystals of yellowish brown Hydroxylherderite to 4mm with a sprinkling of snow white Moraesite.


Hydroxylherderite

Formula
CaBePO4(OH) 
Crystal System
Monoclinic 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
blue, blue green, colorless, greenish white, white 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Sub Conchoidal 
Hardness
5-5.5 
Collection
Dr. Buford Nichols Collection
SOLD
Juanite - PD54028
Juanite - PD54028

Juanite

#PD54028
Locality
Iron mine, Kovdor Massif, Kola Peninsula, Russia 
Formula
Ca10Mg4Al2Si11O39 · 4H2
Availability
Sold
Size
2 x 2.5 x 2 cm - Thumbnail 

The type locality for this mineral is Iron Hill in Colorado, but is found at only two other localities worldwide.  It is a nondescript bluish grey silicate.


Juanite

Formula
Ca10Mg4Al2Si11O39�4(H2O) (?) 
Crystal System
Orthorhombic 
Crystal Habit
Fibrous 
Color
white, pistachio green, brown 
Class
Orthorhombic 
Hardness
5.5 
Collection
Don Phillips Collection
On Dakota Matrix
Previously Sold Juanite
On Dakota Matrix
Other Available Juanite
WebMineral
View Juanite
Mindat
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SOLD
Lazarenkoite - 52409
Lazarenkoite - 52409

Lazarenkoite

#52409
Locality
Khovu-Aksy, Tuva, Siberia, Russia 
Formula
CaFe3+As3+3O7·3H2
Availability
Sold
Size
0.7 x 0.4 x 0.3 cm - Thumbnail 
Special Info
XRD Confirmed 
Special Info
EDS Confirmed 
Special Info
Type & Only Locality 

Deep to bright orange fibrous crystals.  Lazarenkoite has been found in only three worldwide localities, this being the type. Identified by Dr. Igor Pekov.


Lazarenkoite

Formula
CaFe3+As3+3O7·3H2
Crystal System
Orthorhombic 
Crystal Habit
Fibrous, Encrustations 
Luster
Resinous 
Color
light orange 
Streak
light yellow 
Class
Orthorhombic 
Hardness
Special Info
XRD Confirmed
Special Info
EDS Confirmed
Special Info
Type & Only Locality

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