Name/Title
StevensiteEntry/Object ID
2009.62.21Description
Chemical Composition: Ag5SbS4
Crystal System: Orthorhombic System
Description: Common Name: Stevensite pseudomorph after pectolite
Chemistry: (Ca0.5,Na)0.33(Mg,Fe++)3Si4O10(OH)2•n(H2O
Group Name: Sulfosalts
Location: Prospect Park, Paterson, New Jersey, USA
Description: White almost clear crystals bunched together very triangular tops of the crystals.
Physical Properties of Stevensite
Crystal System: Monoclinic
Cleavage: {001} Perfect
Color: Beige white, Yellow brown, Pink.
Density: 2.15 - 2.75, Average = 2.45
Diaphaneity: Translucent
Habit: Fibrous - Crystals made up of fibers.
Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Hardness: 4 - Fluorite
Luminescence: Non-fluorescent.
Luster: Resinous
Magnetism: Nonmagnetic
Streak: white
Fracture: Conchoidal
Hardness: 2 Gypsum
Luster: Metallic
Occurrence: In cavities in basalt, formed by late-stage hydrothermal replacement of pectolite.
A hydrothermal alteration product of igneous rocks, as dunite and tuff. May form authigenically interstratified with other species.
Rock Type: Sedimentary
Specific Gravity: 6.2-6.3
Streak: Black
Texture: Microcrystaline
Variety: Named after Edwin Augustus Stevens (1795-1868), founder of the Stevens Institute of Technology, Hoboken, New Jersey (USA).Collection
RAGM Mineral CollectionAcquisition
Accession
2009.62Source or Donor
Museum Collection of MineralsAcquisition Method
DonationDimensions
Width
2-1/2 inDepth
3-1/2 inLength
6 inWeight
1.04 ozDimension Notes
Dimension taken at widest pointsLocation
Location
Shelf
CS-D-2Room
Curation StorageBuilding
Crater Rock MuseumCategory
StorageMoved By
Curtis GardnerDate
January 3, 2024