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   Weloganite
(Sr3 Na2Zr(CO3)6·3H2O)
D02423A.07
  
Image: D2423A_7.jpg

 
Crystal system hexagonal.
Habit roughly hexagonal crystals in prism form and heavily striated; terminations are pyramidal; stacked plates that enlarge growing outwards.
Cleavage perfect.
Fracture conchoidal.
Hardness 3.5
Specific Gravity 3.2
Color colorless, white, light yellow, green, orange/yellow grading to pink, light green, olive, gray or red.
Luster transparent to opaque with a vitreous luster.
Streak white.
Distinguishing features the stacked plates that seem to enlarge outwards is typical.
Uses of interest to collectors and scientists.







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