Freshwater pearls are created in freshwater waters - rivers and lakes. They come in a wide range of shapes, sizes and colours.
 
Freshwater pearls occur in rivers or lakes and most often are produced by freshwater mussels (Margaritifera margaritifera). It is common to find up to 20 pearls in one shell. Freshwater pearl-producing mussels inhabit not only temperate zones in Europe, but also in North America, mainly in the Mississippi River. Freshwater pearls are very solid, and therefore they are relatively resistant to mechanical damages.

Size: 2.5 - 9.5 mm

Shape: freshwater pearls are not regularly round like pearls - we often encounter many various shapes

Colour: the colour is affected by the environment in which it is made, so we can meet different colours - white, apricot, pink, gray, light and dark blue

Gloss: Freshwater pearls are not as beautiful as the pearls of the sea, but rather gently blurred

 

 

 Sources used:
The Pearl Book - The Definitive Buying Guide. (2008). 4th ed. Woodstock: GemStone Press, pp. 38-62.
Gia.edu. (2016). Pearl Description. [Online] Available at: http://www.gia.edu/pearl-description [Accessed 10 Nov. 2016].