Fluorite

Object/Artifact

-

Crater Rock Museum

Fluorite

Fluorite

Name/Title

Fluorite

Entry/Object ID

2014.1.142(A,B)

Description

Common Name: Fluorite Group Name: Halides Chemistry: CaF2 Location: Unknown Description: Two pieces of pale sea green Fluorite that have bits of quartz scattered on their surfaces. PHYSICAL CHARACTERISTICS: Color is extremely variable and many times can be an intense purple, blue, green or yellow; also colorless, reddish orange, pink, white and brown. A single crystal can be multi-colored. Luster is vitreous. Transparency: Crystals are transparent to translucent. Crystal System: Isometric; 4/m bar 3 2/m Crystal Habits include the typical cube and to a lesser extent, the octahedron as well as combinations of these two and other rarer isometric habits. Always with equant crystals; less common are crusts and botryoidal forms. Twinning also produces penetration twins that look like two cubes grown together. Cleavage is perfect in 4 directions forming octahedrons. Fracture is irregular and brittle. Hardness is 4 Specific Gravity is 3.1+ (average) Streak is white. Other Characteristics: Often fluorescent blue or more rarely green, white, red or violet and may be thermoluminescent, phosphorescent and triboluminescent. Associated Minerals are many and include calcite, quartz, willemite, barite, witherite, apatite, chalcopyrite, galena, sphalerite, pyrite and other sulfides. Best Field Indicators are crystal habit, color zoning, hardness (harder than calcite, but softer than quartz or apatite), fluorescence and especially the octahedral cleavage.

Collection

RAGM Mineral Collection

Acquisition

Accession

2014.1

Source or Donor

Crater Rock Museum (unknown donors)

Acquisition Method

Gift

Location

Location

Shelf

CS-I-1

Room

Curation Storage

Building

Crater Rock Museum

Category

Storage

Moved By

Ian Cunningham

Date

February 7, 2024