The (very high) refractive index of diamond is 2.4 at room temperature.
(From Wikipedia: "Refractive index also describes the quantity that light is bent as it passes through a single substance."
1.680
The optical density of a diamond can be found on the RI (refractive index).It is 2.417
The number is comparative. Refractive index is a dimensionless number that represents how fast radiation -- in this case, light -- travels through a medium, in this case, diamond. The number assigned to a diamond is the highest number on the scale. The scale includes gases, liquids and solids. This means that with a refractive index of 2.42, 'light travels 2.42 times as fast in vacuum as it does in a diamond'. You can read more about refractive indices, below.
Refractive Index: 1.4465
Refractive index of vacuum is 1.
1.680
The optical density of a diamond can be found on the RI (refractive index).It is 2.417
The number is comparative. Refractive index is a dimensionless number that represents how fast radiation -- in this case, light -- travels through a medium, in this case, diamond. The number assigned to a diamond is the highest number on the scale. The scale includes gases, liquids and solids. This means that with a refractive index of 2.42, 'light travels 2.42 times as fast in vacuum as it does in a diamond'. You can read more about refractive indices, below.
I'm assuming you mean what material has the closest refractive index to diamond? Cubic Zirconia is quite close (2.2 vs. diamonds 2.42), and moissanite or silicon carbide as well (2.65).
When cut and polished , it has a high refractive index , and reflects any available light.
Refractive Index: 1.4465
Refractive Index: 2.4175-2.4178
Refractive index of vacuum is 1.
"The refractive index of water is 4 / 3" means the refractive index of water with respect to air. "The refractive index of glass is 3 /2" means the refractive index of glass with respect to air. You change the question as ," what is the refractive index of glass with respect to water? The answer is it is the ratio of refractive index of of glass with respect to air to the refractive index of water with respect to air =( 3/2) divided by( 4/3) = 1.125
Refractive Index(i) Refractive index of a medium is that characteristic which decides speed of light in it.(ii) It is a scalar, unit less and dimensionless quantity.(iii) Absolute refractive index :When light travels from vacuum to any transparent medium then refractive index of medium w.r.t. vacuum is called it's absolute refractive index i.e. vacuumµmedium = c/vAbsolute refractive indices for glass, water and diamond are respectively µg = 3/2 = 1.5, µw = 4/3 = 1.33 and µD = 12/5 = 2.4(iv) Relative refractive index :When light travels from medium (1) to medium (2) then refractive index of medium (2) w.r.t. medium (1) is called it's relative refractive index i.e. 1µ2 = µ2/µ1 = v1/v2 (where v1 and v2 are the speed of light in medium 1 and 2 respectively).(v) When we say refractive index we mean absolute refractive index.(vi) The minimum value of absolute refractive index is 1. For air it is very near to 1. ( 1.003)
I assume "molecular refractive index" refers to "the refractive index of a group of molecules". In this case, you just use the units for a refractive index - i.e., a dimensionless number.
Diamonds 'sparkle' based on the high refractive index of the mineral. Then, add the cut of the stone and its polish which cause light to be reflected and refracted back to the observer's eye. Note that a raw, uncut diamond will not demonstrate its high refractive index.