Fluorite

UNB-2018-0025Minerals » Halides

Description

Sample of euhedral cubic/penetration twins of yellow Fluorite crystals with a vitreous lustre. Average Fluorite crystal size: 1.3 cm x 1.4 cm x 0.5 cm. Fluorite (CaF2) can be violet, blue, green, yellow, brown, bluish black, pink, rose-red, white or colourless. Lustre is vitreous and streak is white. Hardness is 4 and cleavage is perfect in four directions forming an octahedron. Fluorite usually occurs as cubic or penetration twins but can also be octahedral, dodecahedral, cleavage masses, granular or columnar.

Specifications

Object name	Fluorite
ID	UNB-2018-0025
Legal status	Permanent collection
Category	Mineral
Classification	Mineral group: Halides
Composition	NaCl CaF2 (Ce,La)F3·H2O HNa4Be3Al(PO4)3F6 NaF KCl KCl and NaCl NH4Cl Na3AlF6 AgCl KMgCl3•6H2O Cu2Cl(OH)3 Hg2Cl2
Origin	Unknown
Pieces	1
Partial	No
Measurements	4cm x 7.5cm x 4.6cm

Publications

Chesterman, C.W. 1979. Audubon Society, Field Guide to North American Rocks and Minerals. Knopf.