Zektzerite

Zektzerite was first found in 1966 from the Willow creek basin, Okanogan County, Washington. It is named after Jack Zektzer, mathematician and mineral collector of Seattle, Washington.

Zektzerite forms translucent, colourless to pink, cream or white stout pseudohexagonal prisms.

Zektzerite Gemstones by Colour

This table shows the variety of hues this gemstone can be found in. Click on a photo for more information.
 

Zektzerite Gemstones by Size

This table shows distribution of Zektzerite gemstone sizes that are listed on this site. This can give a good indication as to the general availability of this gemstone in different sizes.
Contributed photos
Lightest:.54 cts
Heaviest:1.62 cts
Average:1.08 cts
Total photos:2
Do you have a larger Zektzerite? Why not upload a photo?
0.54ct to 0.65ct0.65ct to 0.76ct0.76ct to 0.86ct0.86ct to 0.97ct0.97ct to 1.08ct1.08ct to 1.19ct1.19ct to 1.30ct1.30ct to 1.40ct1.40ct to 1.51ct1.51ct to 1.62ct
General Information
Chemical Formula
LiNa(Zr,Ti,Hf)Si
 
6
O
 
15
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Photos of natural/un-cut material from mindat.org
Physical Properties of Zektzerite
Mohs Hardness6
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Specific Gravity2.79
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Cleavage QualityPerfect
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Optical Properties of Zektzerite
Refractive Index1.582 to 1.585
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Optical CharacterBiaxial/-
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Birefringence0.003
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
DispersionVery weak
Anthony et al, Handbook of mineralogy (2001)
Colour
Colour (General)Colourless, pink
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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TransparencyTransparent,Translucent
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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LustreVitreous,Pearly
Anthony et al, Handbook of mineralogy (2001)
Fluorescence & other light emissions
Fluorescence (Short Wave UV)There may be a light yellow fluorescence
Michael O’Donoghue, Gems, Sixth Edition (2006)
Crystallography of Zektzerite
Crystal SystemOrthorhombic
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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HabitStout pseudohexagonal prisms
Michael O’Donoghue, Gems, Sixth Edition (2006)
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Geological Environment
Where found:Zektzerite occurs in a small number of miarolitic cavities in a riebeckite granite
Michael O’Donoghue, Gems, Sixth Edition (2006)
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Further Information
Mineral information:Zektzerite information at mindat.org
Significant Gem Localities
USA
 
  • Washington
    • Okanogan Co.
      • Golden Horn Batholith
[MinRec 9:253, 20:152]; Rocks and Minerals, 66:6, p. 457; American Mineralogist, V.73, p.1191-1194
Copyright © Jolyon & Katya Ralph 1993-2018. Site Map. Locality, gem & photograph data are the copyright of the individuals who submitted them. For more information please contact the . Gemdat.org is an online information resource dedicated to providing free gemmological information to all.