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Mostly Rare Minerals

Sunday, 17 March 2024 06:00 PM

Introducing the "Mostly Rare Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including pyromorphite, quartz, renierite, and topaz and more from places like Yangshuo mine, Yangshuo Co., Guilin, Guangxi Zhuang, China, Chiredzi, Masvingo, Zimbabwe, Tsumeb mine, Tsumeb, Namibia, and Khyber Pakhtunkhwa, Pakistan.

Pyromorphite

#63753
Locality
Yangshuo mine, Yangshuo Co., Guilin, Guangxi Zhuang, China 
Formula
Pb5(PO4)3Cl 
Availability
Available
Price
$150.00
Size
5 x 3.5 x 2 cm - Miniature 
Tagged
phosphate  

Green, lustrous, free-standing hexagonal crystals to 5mm emanating from a common point. Very nice miniature.


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 

Quartz

var. amethyst sceptor - #63376
Locality
Chiredzi, Masvingo, Zimbabwe 
Formula
SiO2 
Availability
Available
Price
$350.00
Size
6 x 2.5 x 2.2 cm - Sm Cabinet 

Great specimen of amethyst scepter with phontoms and fascinating Hematite inclusions. 


Quartz

Formula
SiO2 
Crystal System
Trigonal 
Crystal Habit
Crystalline - Coarse, Druse, Crystalline - Fine 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
brown, colorless, violet, gray, yellow 
Streak
white 
Class
Trigonal - Trapezohedral 
Fracture
Conchoidal 
Hardness
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Renierite

with Germanite - #60638
Locality
Tsumeb mine, Tsumeb, Namibia 
Formula
(Cu1+,Zn)11Fe4(Ge4+,As5+)2S16 
Availability
Available
Price
$295.00
Size
4.5 x 3 x 3.5 cm - Miniature 
Tagged
sulfide , copper , germanium  

A good-sized chunk of germanium ore featuring purplish Germanite (TL) and orange bronze Renierite. Excellent specimen for this rather rare material. Getting very rare these days to find this stuff.


Renierite

Formula
(Cu1+,Zn)11Fe4(Ge4+,As5+)2S16 
Crystal System
Tetragonal 
Crystal Habit
Massive - Granular, Disseminated, Twinning Common 
Cleavage
None, None, None 
Luster
Metallic 
Color
bronze yellow, pinkish brown 
Streak
blackish gray 
Class
Tetragonal - Scalenohedral 
Fracture
Uneven 
Hardness
4-5 
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Topaz

#63386
Locality
Khyber Pakhtunkhwa, Pakistan 
Formula
Al2SiO4F2 
Availability
Available
Price
$250.00
Size
4.5 x 3.5 x 2.5 cm - Miniature 

Light pink, gemmy, terminated crystal in matrix.


Topaz

Formula
Al2SiO4F2 
Crystal System
Orthorhombic 
Crystal Habit
Crystalline - Coarse, Prismatic, Massive - Granular 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
colorless, pale blue, yellow, yellowish brown, red 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Uneven 
Hardness
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