Topaz

Topaz, Al2SiO4(F,OH)2
Thomas Range, Juab County, Utah
Gift of Mr. and Mrs. Tony Ladakis
UMNH.MC.3872

Topaz is a mineral that is formed as fluorine-rich vapors rise from cooling lava flows or intrusions of magma. That is the origin of the crystals found at Topaz Mountain in Utah. Topaz occurs in a variety of colors. Colorado topaz is usually pale blue, while Utah topaz is a sherry brown or amber color.
Utah topaz is light sensitive and, if left exposed to strong sunlight, rapidly fades until the color is gone and the crystal is clear. Topaz Mountain, located in the Thomas Range of Juab County, is one of the world's premiere spots for finding topaz. Although there are many private claims in the area, a large tract of federal land has been reserved for collecting to the public. Topaz crystals from Topaz Mountain tend to be small, but quite perfect.

Artifact Label: 
Topaz, Al2SiO4(F,OH)2 Thomas Range, Juab County, Utah Gift of Mr. and Mrs. Tony Ladakis UMNH.MC.3872
Case Name: 
Utah Minerals
Depth: 
3 inches
Exhibit Area: 
Utah Minerals
Exhibit Code: 
MH1.E01.ic01.
Exhibit Name: 
Juab County
File Name: 
a2572_Topaz.jpg a2572_Topaz_tn.jpg
Length: 
4 inches
Loan Numbers: 
UMNH.DT.2010.41
Museum ID Number: 
UMNH.MC.3872 (shares same # as a3999)
Number in case: 
14
Observatory: 
Mineral Hall
RAA A Number: 
a2572
Specimen: 
Topaz
Specimen Location: 
Minerals Hall-Silicates
Subject: 
Mineralogy
Width: 
4 inches
Display Title: 
Topaz
Subject Taxonomy: 
On Exhibit: 
No