By colour
Pink stones
Pink is not a hue. It is low tone and low-to-medium saturation across the red and purple hues, which is why the boundary with ruby is a judgement rather than a measurement — there is no international definition of it and no chemical test. Sri Lanka has historically called pink corundum ruby where buying countries call it pink sapphire, so what a stone is called can depend on which end of the trade you are standing at.
What counts as pink: Low-tone, low-to-medium-saturation red and purple hues. Pink is not a hue — it is a tone and saturation range across two of them. A stone that changes colour is listed under both of its faces, so it appears here if it reads pink in either light.
In stock as spinel.
Stones
2 stones · $5,900 to $13,400