Which sapphire colour to choose
In blue sapphires an even, saturated tone free of grey and blackness is what counts. A stone that is too dark goes dull in the setting, a stone that is too pale looks washed out — the optimum sits between them and is easiest to judge in daylight.
Yellow and pink sapphires cost noticeably less than blue at the same weight, which buys a larger stone on a modest budget. Padparadscha, by contrast, is among the most expensive coloured stones in the world.
Heating and durability
Most sapphires on the market are heated: the treatment removes haze and deepens colour, is stable and accepted worldwide. Unheated stones are rarer and valued higher, so we always state the result in the report.
Hardness 9 on the Mohs scale means a sapphire barely scratches in daily wear and tolerates setting work far better than an emerald.