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   Synchysite-(Y)
(Ca(Y,Ce)(CO3)2F)
NS2309A.02
  
Image: NS2309A.02.jpg

 
Crystal system orthorhombic.
Habit tabular hexagonal crystals with rounded corners, tabular plates and massive; often twinned.
Cleavage undetermined.
Fracture uneven to subconchoidal.
Hardness 6.5
Specific Gravity 3
Color tan, beige, pale green, yellow or brown.
Luster rarely translucent and often opaque with a dull to vitreous luster; resinous to on freshly broken surfaces.
Streak brown.
Distinguishing features often, tabular plates grow into pagoda shaped aggregates.
Uses of interest to collectors and researchers.







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