Name/Title
StilbiteEntry/Object ID
2009.62.60Description
Chemical Composition: NaCa2Al5Si13O36 -14H2O
Crystal System: Monoclinic System
Description: Common Name: Stilbite
Chemistry: NaCa2Al5Si13O36 -14H2O, Hydrated sodium calcium aluminum silicate
Group: Silicates
Location: Midway Quarry, Butte Falls, Jackson County, Oregon
Description: Large specimen with tan to burnt orange elongated crystals varying in size from short to long with some small, druzy white to gray crystals in the vicinity. The matrix is brown to gray and covers a large area.
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: conchoidal
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
Texture: Crystalline
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
Width
11 inDepth
5-1/4 inLength
15 inWeight
7.34 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
left, leftWall
South wallRoom
Delmar Smith HallBuilding
Crater Rock MuseumCategory
PermanentMoved By
Steve MillerDate
January 12, 2010Location
Container
LeftDrawer
BottomShelf
left, leftWall
South wallRoom
Delmar Smith HallBuilding
Crater Rock MuseumCategory
PermanentMoved By
Steve MillerDate
January 12, 2010Location
Shelf
bottom case left cor, bottom case left corWall
south wallRoom
Delmar Smith HallBuilding
Crater Rock MuseumCategory
PermanentMoved By
scottDate
September 19, 2009Location
Container
LeftDrawer
BottomShelf
LeftCabinet
Case #41Wall
South wallRoom
Delmar Smith HallBuilding
Crater Rock MuseumCategory
Permanent