Diamond

Diamond

Diamond is crystallised carbon and the hardest natural material. Its high refractive index bends light sharply, so a well-cut stone sends most of the light that enters its crown back out of the top, and its dispersion splits that light into the coloured flashes jewellers call fire.

  • DiamondDiamond
  • Diamond HDiamond H
  • Diamond KDiamond K
  • Diamond PDiamond P
  • Diamond TDiamond T
  • Yellow diamondYellow diamond
  • Champagne diamondChampagne diamond
  • Cognac diamondCognac diamond
  • Pink diamondPink diamond
  • Blue diamondBlue diamond
  • Green diamondGreen diamond
  • Black diamondBlack diamond

At a glance

Mineral
Carbon, cubic crystal
Refractive index
2.417
Dispersion (C–F)
0.025
Specific gravity
3.52
Mohs hardness
10
Wear
Hard enough for any ring worn every day; a sharp knock on a thin girdle can still chip it.

Diamond in Jart

The 12 looks in the studio's material library, with the values the renderer uses.

Optics of Diamond in Jart
StoneColourRIDispersion C–FAbbeSGColour depth
Diamond#ffffff2.4170.025573.5270 mm
Diamond H#fff4dc2.4170.025573.5245 mm
Diamond K#ffeabd2.4170.025573.5232 mm
Diamond P#ffe1992.4170.025573.5224 mm
Diamond T#ffd8772.4170.025573.5218 mm
Yellow diamond#ffcc1f2.4170.025573.527.7 mm
Champagne diamond#e2b98a2.4170.025573.5212 mm
Cognac diamond#c07b3d2.4170.025573.527 mm
Pink diamond#f5a3c02.4170.025573.5213.8 mm
Blue diamond#8db7ff2.4170.025573.5213.8 mm
Green diamond#a5e0ad2.4170.025573.5213.8 mm
Black diamond#2a2a2e2.4170.025573.520.34 mm

RI refractive index (nd). Dispersion C–F nF − nC, the spread between blue and red light; many gem tables quote the B–G figure instead (diamond 0.044, here 0.025). Abbe number: lower means more fire. SG specific gravity, used for carat estimates in Design Facts. Colour depth the path through the stone after which white light takes the stone's full colour; shorter paths look paler.

How it renders

With a refractive index of 2.417, a polished diamond facet reflects 17.2% of light that meets it face-on (diamond: 17.2%). Light inside the stone that meets a facet more than 24.4° from straight on cannot leave and is reflected back in; the smaller that angle, the more light a good cut returns to the eye (diamond 24.4°, quartz 40.4°).

Its dispersion (C–F) is 0.025, 100% of diamond's, which sets how much fire, the flashes of colour, a render shows under small, bright lights.

Every diamond preset shares the same optics; only the body colour and how fast it builds change. The colourless preset has no tint at all. The H, K, P and T grades take on a warm tint over a long path, so the tint shows more in a large centre stone than in pavé, the way it does in the case.

  • 1 mm
  • 3 mm
  • 6 mm
  • 10 mm
Diamond H: the colour of white light after 1, 3, 6 and 10 mm of stone. It takes the full preset colour at 45 mm.
  • 1 mm
  • 3 mm
  • 6 mm
  • 10 mm
Diamond K: the colour of white light after 1, 3, 6 and 10 mm of stone. It takes the full preset colour at 32 mm.
  • 1 mm
  • 3 mm
  • 6 mm
  • 10 mm
Diamond P: the colour of white light after 1, 3, 6 and 10 mm of stone. It takes the full preset colour at 24 mm.
  • 1 mm
  • 3 mm
  • 6 mm
  • 10 mm
Diamond T: the colour of white light after 1, 3, 6 and 10 mm of stone. It takes the full preset colour at 18 mm.

All gemstones · Metals · Diamond in platinum · Finishes

Render diamond on your own design.

Open a 3DM, STL or GLB file, or a sample ring, choose the stone and the metal, and render it photoreal in your browser. No account needed.

Try Jart free