Looks like a dark blue, but hard to tell since all of the shots are taken at roughly the same angle. As Acinom pointed out, it looks like the lighting is the same in all as well. Makes it a bit hard to interpret.
The "only" hint of green I see is on the top facets, making me wonder what's on the ceiling, or is the photographer wearing a green shirt. Otherwise I see dark inky blue.
Inky, dark royal blue base with some green (upper left and right corners in most photos and even the middle two facets behind the table reflection in one)...
Note the high shine on the tweezers, the stone seems to be frying under all the light it's receiving.
It's normal that you'd have to give a royal blue a lot of light to light up properly, but when you do that and it still looks dim and dead-ish like the example above... Different strokes, but would not recommend unless you live in some land of eternal summer.
Is there some slight colourless or yellow-ish zoning ? No complaint, just curious.
Wouldn't take pictures too seriously for fine points of tone & saturation. I'd hope to see the object at its best, and some evidence that the lighting & display etc. are not too out of the ordinary, so I will get to see the colour etc. in evidence, more often than not ...
It's probably not going to show green in real life just a dark blue.... unless it's an Aussie sapphire and then you might get flashes of green over the dark blue that you can actually see.