Name/Title
StilbiteEntry/Object ID
2009.62.78Description
Chemical Composition: NaCa2Al5Si13O36 -14H
Crystal System: Monoclinic System
Description: Common Name: Stilbite
Chemistry: NaCa2Al5Si13O36 -14H2O, Hydrated sodium calcium aluminum silicate
Group: Zeolites
Location: Midway Quarry, Butte Falls Hwy, Jackson County, OR
Description: Large specimen with cauliflower textured crystals and a beige color on a course- grained sandstone matrix.
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.
Fracture: uneven
Hardness: 4 Flourite
Luster: Vitreous
Occurrence: Stilbite commonly forms nice crystals inside the petrified bubbles (called vesicles) of volcanic rocks that have undergone a small amount of metamorphism.
Specific Gravity: 2.2
Streak: white
Variety: Stilbite is a mineral of secondary origin, and occurs with other zeolites in the amygdaloidal cavities of basaltic volcanic rocks; it is sometimes found in granite and gneiss, and exceptionally in hydrothermal veins.Collection
RAGM Mineral CollectionAcquisition
Accession
2009.62Source or Donor
Museum Collection of MineralsAcquisition Method
DonationDimensions
Height
13 inLength
12 inWeight
12.08 ozDimension 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
Container
LeftDrawer
BottomShelf
Center, CenterWall
South wallRoom
Delmar Smith HallBuilding
Crater Rock MuseumCategory
PermanentMoved By
Steve MillerDate
January 15, 2010Location
Shelf
bottom of case #42, bottom of case #42Wall
south wallRoom
Delmar Smith HallBuilding
Crater Rock MuseumCategory
PermanentMoved By
scottDate
September 19, 2009Location
Container
RightDrawer
BottomShelf
LeftCabinet
Case #41Wall
South wallRoom
Delmar Smith HallBuilding
Crater Rock MuseumCategory
Permanent