Name/Title
StilbiteEntry/Object ID
2004.1.55Description
Assemblage Zone: pegmatite dikes
Chemical Composition: NaCa2Al5Si13O36 -14H2O
Crystal System: Monoclinic System
Description: Common Name:Stilbite
Group Name: silicates
Chemistry: (Ca,Na)3Al5(Al,Si)Si14O40*15H20
Location:Wagholi, Pune District, Mahurashtra, India
Description: Light clear/tanish crystals with a dark purple near the bottom.
PHYSICAL CHARACTERISTICS:
Color is pink or white; also tinted yellow and red.
Luster is vitreous to pearly especially on the prominant pinacoid and cleavage surfaces.
Transparency: crystals are transparent to mostly translucent.
Crystal System is monoclinic; 2/m
Crystal Habits include platy often thin crystals that can aggregate together into a wheat sheaflike structure. The prominant pinacoid is sometimes but rarely modified by other pinacoid and prism faces. Cruciform (cross-like) twins can also be found. Also forms radiating nodules.
Cleavage is perfect in one direction parallel to the prominant pinacoid.
Fracture is uneven.
Hardness is 3.5 - 4.
Specific Gravity is approximately 2.2 (very light)
Streak is white.
Associated Minerals are quartz, calcite, babingtonite, apophyllite, heulandite, natrolite and other zeolites.
Best Field Indicators are crystal habit, luster, density and associations.
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Fracture: uneven
Hardness: 3 Calcite
Luster: Vitreous
Occurrence: Stilbite crystals can aggregate together to form a structure resembling wheat sheafs. This hourglass structure looks like several crystals stacked parallel to each other with the tops and bottoms of this structure fanning out while the middle remains thin. Stilbite's hallmark crystal habit is unique to stilbite and a rarer but related zeolite called stellerite. Whether in the wheat sheafs or not, stilbite can be a hansome specimen with its pearly luster and often colorful pink tints. Stilbite commonly forms nice crystals inside the petrified bubbles (called vesicles) of volcanic rocks that have undergone a small amount of metamorphism
Notable Occurrences include Poona, India; Scotland; Iceland; New Jersey and Nova Scotia, Canada.
Specific Gravity: 2.2
Streak: white
Variety: n/aCollection
Suomynona Mineral Collection, Suomynona CollectionAcquisition
Accession
2004.1Source or Donor
Suomynona Mineral CollectionAcquisition Method
DonationDimensions
Width
12 inDepth
5 inLength
15 inDimension Notes
Dimension taken at widest pointsLocation
Location
Display Case
DS-6Room
Delmar Smith HallBuilding
Crater Rock MuseumCategory
PermanentMoved By
Curtis GardnerDate
May 24, 2023Notes
Added current locationLocation
Shelf
Bottom-cubby, Bottom-cubbyRoom
Delmar Smith HallBuilding
Crater Rock MuseumCategory
PermanentMoved By
Rawley WyattDate
July 3, 2015Location
Drawer
CenterShelf
Top, TopWall
east wallBuilding
Freida L Smith HallCategory
PermanentMoved By
Scott LonganDate
August 25, 2009Location
Container
RightDrawer
BottomShelf
Left, LeftWall
NorthBuilding
Freida L Smith HallCategory
PermanentMoved By
Scott LonganDate
August 25, 2009Location
Shelf
Bottom-cubbyCabinet
Case # 51Building
Delmar Smith Hall case 72Category
Permanent
