Name/Title
StilbiteEntry/Object ID
2009.62.77Description
Chemical Composition: NaCa2Al5Si13O36 -14H2O
Crystal System: Orthorhombic System
Description: Common Name: Stilbite
Chemistry: NaCa2Al5Si13O36 -14H2O, Hydrated sodium calcium aluminum silicate
Group: Silicates
Location: Midway Quarry, Butte Falls Hwy, Jackson County, OR
Description: Medium specimen with peach colored crystals varying in size.
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: 3 Calcite
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
Height
6 inWidth
2 inLength
2-1/2 inWeight
1.14 ozDimension Notes
Dimension taken at widest pointsLocation
Location
Shelf
CS-F-4Room
Curation StorageBuilding
Crater Rock MuseumCategory
StorageMoved By
Ian C.Date
March 26, 2025Category
PermanentMoved By
Curtis GardnerDate
May 25, 2023Notes
Added current location
