Mermaid's Indigo 1/2" Blue Mussel Shell Buttons, 13mm Pack of 22 Buttons $10 #KB-910 Picture Buttons Depth including the screw is

Depth including the screw is about 1/4"

and of course the crinkly wavy stripes

not sleek but matte

The dyer probably used local plants and mud

of repeating bowls

Mermaid's Indigo 1/2" Blue Mussel Shell Buttons, 13mm Pack of 22 Buttons $10 #KB-910 Picture Buttons Depth including the screw isFull of color, these are made from Blue Mussel shells and each is more beautiful than the last. Indigo is the predominant color, with grays, whites and purples. 1 2" diameter, two 1mm holes, with lots of variance, as you can see from the photos. Some have ridges, some are flatter, some are more rustic. The fronts are smooth and have high shine. The backs are full of color also, some more striped than others. Radiant natural art buttons from the sea,