THE
MINERAL JORDANITE
- Chemistry: Pb14(As, Sb)6S23, Lead Arsenic Antimony Sulfide
- Class: Sulfides
- Subclass: Sulfosalts
- Uses: As a very minor ore of lead and arsenic and as mineral specimens.
- Specimens
Jordanite forms sharp, nicely formed crystals sometimes with deep striations. The contrasting dark gray to black, high lustered mineral sitting on a backdrop of massive white dolomitic marble makes for a very nice mineral display specimen. Jordanite is a rare sulfide mineral found mostly at the famous quarry of
PHYSICAL CHARACTERISTICS:
- Color is a lead gray to black.
- Luster is metallic.
- Transparency: Crystals are opaque.
- Crystal System: Monoclinic; 2/m.
- Crystal Habits include deeply striated prismatic and dipyramidal crystals and pseudohexagonal twins; also globular and granular forms.
- Cleavage is poor in one direction.
- Fracture: Conchoidal.
- Hardness is 3.
- Specific Gravity is 5.5 - 6.4 (heavier than average for metallic minerals)
- Streak is dark brown.
- Associated Minerals include
lengenbachite , pyrite, bournonite,seligmannite ,breithauptite ,nisbite ,costibite , arsenopyrite,gudmundite , meneghinite, sphalerite and dolomite. - Notable Occurrences are limited to the type locality, the
Lengenbach Quarry , Binnental, Valais, Switzerland as well as Zuni Mine, Silverton, San Juan County, Colorado and Sinking Valley, Pennsylvania, USA. - Best Field Indicators are crystal habit, locality, striations, associations and density.
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