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Rare Minerals for Sale

Sunday, 15 July 2018 06:00 PM

Introducing the "Rare Minerals for Sale" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including pyromorphite, and synadelphite and more from places like Tsumeb mine, Tsumeb, Namibia, and Harstigen mine, Filipstad, Värmland, Sweden.

Pyromorphite

or Mimetite(?) - #PD49369
Locality
Tsumeb mine, Tsumeb, Namibia 
Formula
Pb5(PO4)3Cl 
Availability
Available
Price
$95.00
Size
4.5 x 3.5 x 1.5 cm - Miniature 
Tagged
phosphate  

Light yellow prismatic crystals from 1 to 10mm with pointed terminations.Originated from the collection of Peter Indergand with with matching numbers on tag and specimen. Pyromorphite is not common at Tsumeb, but this may indeed be Mimetite.


Pyromorphite

Formula
Pb5(PO4)3Cl 
Crystal System
Hexagonal 
Crystal Habit
Crystals short to long prismatic, acicular, often hoppered terminations, rarely tabular to equant; radiating to branching groups, tapering to a point. Commonly rounded, globular, reniform, botryoidal. 
Cleavage
On {1011}, interrupted 
Luster
Resinous to subadamantine 
Color
Dark grass-green, green, yellow, yellow-orange, reddish orange, yellow-brown, brown, tan, grayish, may be colorless 
Streak
White 
Geological Setting
A secondary mineral in the oxidized zone of lead deposits 
Class
Hexagonal, 6/m - Dipyramidal 
Fracture
Uneven to subconchoidal 
Hardness
3.5–4 
Collection
Don Phillips Collection

Synadelphite

#41248
Locality
Harstigen mine, Filipstad, Värmland, Sweden 
Formula
Mn2+9(As3+O3)(As5+O4)2(OH)9·2H2
Availability
Available
Price
$195.00
Size
0.9 x 0.7 x 0.4 cm - Thumbnail 
Special Info
Type Material 

Brownish yellow crystalline mineral. Ex. Georg Gebhard with tag. The specimen is part of the type from the British Museum in London. This information is stated on the backside of the label (see prov tab).


Synadelphite

Formula
Mn2+9(As3+O3)(As5+O4)2(OH)9·2H2
Crystal System
Orthorhombic 
Crystal Habit
Tabular, Prismatic, Reniform 
Cleavage
Indistinct, None, None 
Luster
Vitreous - Adamantine 
Color
colorless, red, reddish brown, dark brown, black 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
4.5 
Collection
Ex. Georg Gebhard
Special Info
Type Material

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