Datolite

Object/Artifact

-

Crater Rock Museum

Name/Title

Datolite

Entry/Object ID

2014.1.50

Description

Chemical Composition: Al(OH)3 Crystal System: Hexagonal System Description: Common Name: Datolite Chemistry: CaBSiO4(OH) Group: Silicates Location: Unknown Description: Two different crystal formations (one is unknown) consisting of dull greenish large crystals of varying sizes. The other crystals are elongated whiteand mica-like. Physical Charateristics: Color is white, colorless, yellowish, reddish, gray, brown and green. • Luster is vitreous to greasy. Transparency: Crystals are transparent to translucent. • Crystal System: Monoclinic; 2/m • Crystal Habits include short prismatic to wedge shaped tabular crystals with complex and richly faceted terminations. Also in porcelain-like masses that form nodules. Aggregates can be fibrous or granular. • Cleavage is absent. • Fracture is conchoidal to uneven. • Hardness is 5 - 5.5 • Specific Gravity is 2.8 - 3.0 • Streak is white. • Associated Minerals are prehnite, danburite, babingtonite, epidote, copper, calcite, quartz and zeolites. • Notable Occurances include Russia; Lake Superior region of Michigan and Paterson, New Jersey, USA; Bancroft, Ontario, Canada; Charcas, Mexico; Schwarzwald, Germany and Norway. • Best Field Indicators are crystal habit, absence of cleavage, hardness and color. 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

4 in

Width

2 in

Length

3 in

Location

Location

Display Case

FS-11

Room

Frieda Smith Hall

Building

Crater Rock Museum

Category

Exhibit

Moved By

Ian C.

Date

January 29, 2025

Notes

Location/ inventory