Copper minerals
Turquoise
Turquoise is sky blue to green and porous; most stones on the market are stabilised to harden them and fix the colour.
Turquoise
At a glance
- Mineral
- Hydrated copper aluminium phosphate
- Refractive index
- 1.61
- Dispersion (C–F)
- —
- Specific gravity
- 2.70
- Mohs hardness
- 5–6
- Wear
- Soft and porous: keep it away from oils, cosmetics and heat.
Turquoise in Jart
The look in the studio's material library, with the values the renderer uses.
| Stone | Colour | RI | Dispersion C–F | Abbe | SG | Colour depth |
|---|---|---|---|---|---|---|
| Turquoise | #3fb8b0 | 1.61 | — | — | 2.70 | opaque |
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 1.61, a polished turquoise facet reflects 5.5% of light that meets it face-on (diamond: 17.2%). Light inside the stone that meets a facet more than 38.4° 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°).
It is opaque: light reflects from its surface and does not travel through it, so it shows no fire, and its look comes from its colour, its polish and what the lighting reflects.
In a render it is an opaque, polished surface with a soft gloss; it reads warm in yellow gold and cool in silver or white gold.
Related stones
All gemstones · Metals · Stone and metal pairings · Finishes
Render turquoise on your own design.
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