Click to return to Marble Catalog

MARBLE
A metamorphic (recrystallized limestone composed predominantly of crystalline grains of calcite or dolomite, or both, having interlocking or mosaic texture. Marble that contains less than 5% magnesium carbonate may be termed calcite marble; from 5 to 40 % magnesium carbonate, magnesium carbonate, magnesium or dolomite marble. These limiting values are, however, not strictly established in petrologic science and are used herein as arbitrary limits.
GROUP
Metamorphic
COMMON ROCK-FORMING MINERAL GROUP
Calcareous
COMPOSITION
Calcite, dolomite or a combination of both and accessory minerals acting as colouring agents. Veining minerals range from calcite, quartz and a variety of other minerals.
HARDNESS
Soft to hard, generally soft to medium.
MOHS' SCALE
Not available
POROSITY
0.5 - 2.0 %
ABSORPTION
Not available
WEATHERING CHARACTERISTICS
Moisture sensitive as a rule. All polished marbles will lose their polish in exterior application.
TENDENCIES
Absorbs oils and liquids and get scratched easily. Acid sensitive.
COLOURS
Every colour is possible due to the variability of accessory minerals.
FINISHES
Honed & Polish.