Zektzerite

The mineral Zektzerite is a member of the tuhualite group and was first found in 1966 from the Willow creek basin below Silver Star mountain in the agpaitic granite phase of the Golden Horn batholith, Okanogan County, Washington by Bart Cannon of Seattle, Washington. It is named for Jack Zektzer of Seattle, Washington who first recognized that the mineral was unknown.
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General Information:
 Chemical Formula:
NaLiZrSi6O15
 Composition:
(Molecular Weight = 529.66 gm)
Sodium 4.34 % Na
Lithium 1.31 % Li
Zirconium 17.22 % Zr
Silicon 31.82 % Si
Oxygen 45.31 % O 
 Empirical Formula:
NaLiZrSi6O15
 IMA Status:
Approved IMA 1977
Physical Properties:
 Cleavage:
[100] Perfect, [010] Perfect
 Color:
colorless or pink.
 Density:
2.79
 Diaphaniety:
Transparent
 Hardness:
6 - Orthoclase
 Luminescence:
Fluorescent.
 Luster:
Vitreous - Pearly
 Streak:
white
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