No one can tell anything about anything from a blurry pic that close up.

@Lomo The biggest question is if it is standard to finish the edges and to expect a tile store to finish the edges without being told.

Is the GC getting paid as a true GC? Is he suppling all the material and coordinating all of the trades? Typically that is what a GC is for and as such he is typically responsible for all aspects of the project. Including make sure HIS sub-contractors work and materials are correct. Is there a tile setter involved?

Those are prefab thresholds and the edges are never finished on them because they are meant to butt to material. You get what you get with stock materials. You don’t get customization on a $50 product.

Custom thresholds from a fabricator are much trickier, as you can only go so thin before the stone breaks. They also sde not going to be anywhere close to $50. ++++

That looks like a better candidate for a Schluter Reno than a threshold.

@Lomo That isn’t supposed to be stock material. It was a $100+ threshold that was supposed to be custom. How can you tell it is stock?

@millworkman. We paid the GC $60k for project management and they have bought some but not all materials. Finishes were left to us - and we went to a tile store recommended by them, our architect and kitchen designer (i.e reputable).
Their tile guy did the install and it is the only one of the three that looks bad. The others hit the tile and wood sides perfectly - although the tow others are a different stone.

Every prefab threshold I've seen has had finished edges, usually with a bevel. That looks to be a custom piece, and if the fabricator was not instructed to finish the edges, then they would have no reason to do so. They are not mind readers and don't know what the jobsite looks like. It is up to the GC to figure out who pays for it, but ultimately the GC owes you a properly finished threshold.

GC removes it nd takes it back to the shop where they put a polish on it.

Agreed with others--the GC figures out who (other than you) pays for it since he provided the specs. But I also agree with Lomo that I don't think I'd use a saddle here at all. We just did a low profile custom wood threshold between our wood and hex tiles--considered a marble saddle but ours, like yours, would not have been flush with the adjacent flooring and we wanted it relatively flat. It worked out well and cost far less than the stone threshold. Before we decided to do that, I did look at ordering a custom threshold from a marble shop since if we'd gone that route, we wanted it to match our shower curbs--for that, you had to specify exactly which sides and faces were to be finished.

Stock thresholds will always have finished edges. When ordering custom, the details must be specified for the fabricator.

Finish 1 face and 2 length edges.

Profile 2 length edges - micro bevel, bevel, pencil edge, 1/2 bullnose etc.

Without removing the threshold. Using diamond grit hand pads, I would micro bevel the edges, smooth the sides and apply a stone enhancer. Done.

Of course I would have finished it on site prior to installing it as it was obvious the added fabrication was required.