Which two minerals have compositions that are most similar to calcite

Magnesite and Dolomite

Calcite is a carbonate mineral which readily occurs in the form of calcium carbonate, CaCO3

Magnesite which occurs in the form of magnesium carbonate (MgCO3) and dolomite which is essentially a mixture of calcium-magnesium carbonate (CaMg(CO3)2) are the two minerals that have compositions similar to calcite.

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.