FG polycrystalline synthetic micron diamond powder, standard size range

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FG micron diamond powder is preferred in applications where high performance and reproducibility are required. FG micron diamond powder is available as diamond powder and as ready-to-use diamond suspension.

Particle strength: The high toughness of polycrystalline diamond tolerates three times higher operating pressures than monocrystalline diamond. This allows for significantly higher material removal rates compared to other diamond types.

Self-sharpening: During the lapping process, the applied pressure causes single crystallite grains to break away from the particle. Fracturing exposes new, sharp cutting edges. This self-sharpening of the particle allows for continuously high abrasion rates.

This material data has been provided by Pureon.

"Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts





3.51 g/cm³

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Particle size range

40 µm

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Please refer to the technological properties section below for more detailed (narrow) particle size ranges available.



Hardness, Mohs

10 [-]

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Coefficient of thermal expansion

1.1e-06 1/K

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Thermal conductivity

600 - 4000 W/(m·K)

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Band gap

6 eV

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Electrical resistivity

1e+12 - 1e+19 Ω·m

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Refractive index

2 [-]

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Chemical properties



99 %

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min. purity

Technological properties

Application areas

FG micron diamond powder is ideal for lapping applications requiring a high stock removal and a controlled surface finish. Typical applications include lapping and polishing of sapphire, synthetic gemstones, ceramics, tungsten carbide, soft and hard metals.


Dark gray

Crystal structure



Standard size range The standard size range makes this product suitable for applications that focus primarily on cost. The controlled upper-limit ensures a uniform, scratch-free surface quality.


The micro-structured, rough particle surface provides numerous contact points between diamond particles and the work piece. This feature ensures high material removal rates even in processes with low specific pressure, such as polishing processes on soft cloths or pads.

Particle size range table

Micron Size
Median (D50)
Upper Limit (D99)
µm max.
FG 0.25   (0-0.5)0.300.25-0.350.69
FG 0.5   (0-1)0.550.46-0.641.10
FG 1   (0-2)1.100.99-1.212.20
FG 1.5   (1-2.5)1.601.44-1.762.90
FG 2   (1-3)2.001.82-2.183.50
FG 3   (2-4)3.102.82-3.385.00
FG 4   (2-6)4.203.82-4.586.70
FG 5   (3-7)5.304.82-5.788.00
FG 6   (4-8)6.305.73-6.879.50
FG 9   (6-12)10.09.10-10.9014.50
FG 12   (8-16)14.012.74-15.2620.3
FG 15   (12-22)17.515.93-19.0825.4
FG 30   (20-40)32.029.12-34.8846.4


Polycrystalline diamond is formed by detonation synthesis. The ultra-short synthesis time yields diamond particles with a polycrystalline structure. Each diamond particle consists of countless primary crystals of approximately twenty nanometers in size. The rough particle surface and the high particle strength of polycrystalline diamond are characteristic features of polycrystalline diamond synthesis. Proprietary shaping and cleaning processes guarantee a uniform, blocky particle shape and a controlled product purity.