Button shape freshwater pearls are a type of cultured freshwater pearls that are cultivated in freshwater mussels. These pearls are formed when an irritant or nucleus is inserted into the mussel, which then secretes nacre around it, resulting in the formation of a pearl.

The shape of button pearls is characterized by their slightly flattened appearance, similar to a button or a disc. This distinctive shape sets them apart from the more common round pearls and gives them a unique and eye-catching look.

Freshwater pearls are mainly farmed in countries such as China and are known for their wide range of colors, including white, pink, peach, lavender, and even metallic shades. The farming process involves carefully managing the mussels in freshwater lakes, rivers, and ponds, where they are nurtured and monitored until the pearls are ready to be harvested.

As for the price, button shape freshwater pearls are generally more affordable than saltwater pearls due to their abundance and the fact that freshwater mussels can produce multiple pearls at a time. However, the price can vary based on the size, luster, surface quality, shape, and color of the pearls. Generally speaking, button shape freshwater pearls are a good option for those looking for unique, high-quality pearls at a reasonable price.