Olivine

Peridot

Peridot is gem olivine, one of the few gems that comes in only one colour family: lime to olive green.

  • PeridotPeridot

At a glance

Mineral
Olivine (forsterite), green from iron
Refractive index
1.67
Dispersion (C–F)
0.012
Specific gravity
3.34
Mohs hardness
6.5–7
Wear
Moderately hard: good in earrings and pendants, rings with care.

Peridot in Jart

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

Optics of Peridot in Jart
StoneColourRIDispersion C–FAbbeSGColour depth
Peridot#9bd23c1.670.012563.346 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 1.67, a polished peridot facet reflects 6.3% of light that meets it face-on (diamond: 17.2%). Light inside the stone that meets a facet more than 36.8° 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 0.012, 49% of diamond's, which sets how much fire, the flashes of colour, a render shows under small, bright lights.

It has more fire than sapphire, so a well-lit render shows small coloured flashes in its green.

  • 1 mm
  • 3 mm
  • 6 mm
  • 10 mm
Peridot: the colour of white light after 1, 3, 6 and 10 mm of stone. It takes the full preset colour at 6 mm.

All gemstones · Metals · Stone and metal pairings · Finishes

Render peridot 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.

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