What is the ratio of coal to diamond?

Diamond is considered to be almost pure carbon. (C - 12 g/mole). Coal, depending on the kind can vary in the amount of Hydrogen, and other things elements like O, S etc. For simplicity, choose a “high grade coal” like Anthracite. Almost all C and H alone, typically in a ratio of C:H::1:0.8 or 5 Carbons for 4 Hydrogens. read more

Ratio of coal to diamond is 100/93.75 = 1.067. Another assumption involving a C:H :: 1:1 ratio in coal on atomic basis would change the mass ratio to 12/13 and then you can do similar math get a slightly different ratio. read more

Density of diamond = 3.51 g/cc Density of graphite = 2.26 g/cc Coal is made of graphite plus organic impurities. So, 3.51/2.26 = 1.55 The ratio in volume of coal to the diamond it becomes is 1.55:1 read more

Diamond has a density of about 3.5, or roughly 3.5 times the density of coal, so the volume of diamond formed from coal would be about 30 % that of the coal, if in fact it formed that way (the volume would be reduce by about 70 %). read more

A diamond simulant is a non-diamond material that is used to simulate the appearance of a diamond, and may be referred to as diamante. Cubic zirconia is the most common. The gemstone moissanite (silicon carbide) can be treated as a diamond simulant, though more costly to produce than cubic zirconia. read more