>>18580241
Most high end brands will have horn and shell buttons in their line sheet but it's going to be a very small percent of total styles and typically the designs that lean more towards rustic. They chip and break incredibly easily and are notorious for getting broken at the dry cleaners.
Again, like I said there's a reason 99% of all brands including the most high end ones have switched to plastic buttons. Sometimes synthetics are simply better for certain use cases. You very rarely see natural rubber soles anymore either. Because they have terrible durability, get filthy incredibly easily, are difficult to clean, and degrade much faster than synthetic rubber while being more expensive.
Better yet look at thread, almost all thread on Earth now is synthetic. Even at the haute couture ateliers of Paris where a dress starts at $25,000 and can reach in excess of $100,000. They're sewing it with Polyester thread, because it's completely colour fast and does not degrade or rot when exposed to UV and human sweat and body oils. Pretty much the only place left in the fashion industry that uses cotton thread is knitwear that's dyed after construction, because synthetic threads don't take dyes.
Not everything that's natural is a straight upgrade over synthetics. There's plenty of areas where companies cheap out by going the synthetic route (particularly in knitwear). But linings and buttons are not a good example of this.