Here's a short story:

Marble is a metamorphic rock composed of recrystallized carbonate minerals, most commonly calcite or dolomite. Marble may be foliated. Geologists use the term "marble" to refer to metamorphosed limestone; however, stonemasons use the term more broadly to encompass unmetamorphosed limestone. Marble is commonly used for sculpture and as a building material. 

The word "marble" derives from the Ancient Greek , from , "crystalline rock, shining stone", perhaps from the verb , "to flash, sparkle, gleam"; R. S. P. Beekes has suggested that a "Pre-Greek origin is probable." 

This stem is also the basis for the English word "marmoreal", meaning "marble-like." While the English term resembles the French ', most other European languages follow the original Greek—see Persian and Irish ', Spanish ', Italian ', Portuguese ', Welsh, Slovene, German, Norwegian, Danish and Swedish ', Finnish "marmori," Romanian ', Polish ', Dutch ', Turkish '," "Czech ', and Russian ). In Hungarian it is called '. 

Marble is a rock resulting from metamorphism of sedimentary carbonate rocks, most commonly limestone or dolomite rock. Metamorphism causes variable recrystallization of the original carbonate mineral grains. The resulting marble rock is typically composed of an interlocking mosaic of carbonate crystals. Primary sedimentary textures and structures of the original carbonate rock (protolith) have typically been modified or destroyed. (End of story)

Provide your best guess for the following question. Give ONLY the guess, no other words or explanation.

For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>

Here are a few examples of questions and answers:

Question: what language is marble from?
Guess: Ancient Greek

Question: what is it?
Guess: a metamorphic rock

Question: what is it made of?
Guess: recrystallized carbonate minerals

Question: are any of those listed?
Guess: Yes

Question: how many?
Guess: Two

Now answer the following question in the same format.

Question: what are they?

calcite and dolomite