Quartz

Citrine

Citrine is yellow to orange quartz. Much of what is sold is amethyst heated until it turns golden.

  • CitrineCitrine

At a glance

Mineral
Quartz, yellow to orange; often heated amethyst
Refractive index
1.55
Dispersion (C–F)
0.008
Specific gravity
2.65
Mohs hardness
7
Wear
Fine for rings with some care.

Citrine in Jart

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

Optics of Citrine in Jart
StoneColourRIDispersion C–FAbbeSGColour depth
Citrine#ffbd4c1.550.008692.656 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 1.55, a polished citrine facet reflects 4.7% of light that meets it face-on (diamond: 17.2%). Light inside the stone that meets a facet more than 40.2° 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 0.008, 32% of diamond's, which sets how much fire, the flashes of colour, a render shows under small, bright lights.

Next to yellow sapphire it has a lower refractive index and lower density: the same colour, less brilliance and a lighter stone for its size.

  • 1 mm
  • 3 mm
  • 6 mm
  • 10 mm
Citrine: 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 citrine 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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