Natrolite

Object/Artifact

-

Crater Rock Museum

Name/Title

Natrolite

Entry/Object ID

2014.1.19

Description

Chemical Composition: Al(OH)3 Crystal System: Hexagonal System Description: Common Name: Natrolite Chemistry: Na2Al2Si3O10-2H2O Group: Silicates Location: Oregon Description: Rough matrix with one side covered in a druzy and sprayed crystalline structure with very fine needles. Physical Charateristics: •Color is clear or white; also tinted yellow and brown. •Luster is vitreous to dull on some compact masses. •Transparency: crystals are transparent to translucent. •Crystal System is orthorhombic; mm2 •Crystal Habits include sprays of needle thin acicular crystals with a pyramidal termination. Also nodules, fiberous and massive crusts. •Cleavage is perfect in two directions, prismatic. Cleavage is rarely seen due to small crystal size. •Fracture is conchoidal. •Hardness is 5 - 5.5. •Specific Gravity is approximately 2.2 (very light) •Streak is white. •Associated Minerals are quartz, apophyllite, benitoite, heulandite, stilbite and other zeolites. •Notable Occurrences include Poona, India; San Benito, California; New Jersey and Nova Scotia. •Best Field Indicators are crystal habit, density and associations. Hardness: 7 Quartz Rock Type: Sedimentary

Collection

RAGM Mineral Collection

Acquisition

Accession

2014.1

Source or Donor

Crater Rock Museum (unknown donors)

Acquisition Method

Gift

Dimensions

Height

2-3/4 in

Width

1-1/2 in

Length

1-3/4 in

Location

Location

Display Case

FS-11

Room

Frieda Smith Hall

Building

Crater Rock Museum

Category

Permanent

Moved By

Curtis Gardner

Date

December 27, 2023