Name/Title
JamesoniteEntry/Object ID
2009.62.202Description
Chemical Composition: Sulfides&sulfosalts
Crystal System: Monoclinic System
Description: Common Name: Jamesonite
Chemistry: Pb4FeSb6S14
Location: Uchucchacua Mine, Oyón District, Oyón Province, Lima, Peru
Description:
PHYSICAL CHARACTERISTICS:
Color is dark gray.
Luster is metallic and silky.
Transparency Crystals are opaque.
Crystal System: Monoclinic; 2/m
Crystal Habits include dense or sparse felted masses of acicular crystals. Also in fiberous masses.
Cleavage is good in one direction perpedicular to its length.
Fracture is uneven.
Hardness is 2 - 3
Specific Gravity is 5.5-6.0
Streak is gray-black.
Best Field Indicators are crystal habit, low density, associations, solubility in water, taste and color.
Fracture: Uneven
Hardness: 3 Calcite
Luster: Silky
Occurrence: Notable Occurrences include Cornwall, England; South Dakota and Arkansas, USA; Zacatecas, Mexico and Rumania.
Rock Type: Metamorphic
Specific Gravity: 5.5-6.0
Streak: Gray/black
Variety: Boulangerite and millerite are two other sulfides that form similar acicular crystals and can be mistaken for jamesonite. However, millerite is yellow and boulangerite has flexible crystals. Jamesonite also forms larger prismatic crystals that can be confused with stibnite. Jamesonite crystals have less definition in its crystals and are more brittle.Collection
RAGM Mineral CollectionDimensions
Width
7 inDepth
2 inLength
10 inLocation
Location
Display Case
DS-10Room
Delmar Smith HallBuilding
Crater Rock MuseumCategory
PermanentMoved By
Curtis GardnerDate
May 10, 2023Notes
Added current location while cleaning shelf.
