Chrysotile

Object/Artifact

-

Crater Rock Museum

Name/Title

Chrysotile

Entry/Object ID

2014.1.20

Description

Chemical Composition: Al(OH)3 Crystal System: Hexagonal System Description: Common Name: Chrysotile Chemistry: Mg3(Si2O5)(OH)4 Group: Silicates Location: Josephine County, Oregon Description: Small beige specimen with verticle layers of mica-like structure surrounding entire specimen. Physical Charateristics: •Color is olive green, yellow or golden, brown, or black. •Luster is greasy, waxy or silky. •Transparency crystals are translucent and masses are opaque. •Crystal System is variable, see above. •Crystal Habits: never in large individual crystals, usually compact masses or fibrous. Veins of viberous serpentine can be found inside of massive serpentine or other rocks. •Cleavage the varieties of crysotile have none, in lizardite and antigorite it is good in one direction. •Fracture is conchoidal in antigorite and lizardite and splintery in the crysotiles. •Hardness is 3 - 4.5 •Specific Gravity is 2.2 - 2.6 •Streak white •Associated Minerals include chromite, olivine, garnets, calcite, biotite and talc. •Other Characteristics: serpentine in the rough has a silky feel to the touch and fibers are very flexible. •Notable Occurances Val Antigorio, Italy; Russia; Rhodesia Switzerland; North Carolina, California, Rhode Island and Arizona, USA and Quebec, Canada. •Best Field Indicators softness, color, silky feel and luster, asbestos if present and its flexibility. 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

2-1/4 in

Width

1-1/4 in

Length

1-11/16 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

Location

Shelf

4th shelf

Cabinet

Case# 20

Wall

West

Building

Freida Smith Hall

Category

Permanent