Rock group	Metamorphic
Metamorphism type	Regional
Metamorphic rock class	Carbonate
Protolith	Limestone
Common minerals	Calcite Dolomite Micas

Marble in Hand Sample

Plain white marble
Finer-grained white marble
Pink marble
Castner marble from the Franklin Mountains in southwest Texas
Castner marble featuring garnet porphyroblasts
A stromatolite preserved in Castner marble

Marble in Thin Section

Marble in plane polars
Marble in crossed polars
Marble breccia in plane polars
Marble breccia in crossed polars
Serpentine marble in plane polars
Serpentine marble in crossed polars