2 lovely tiny mussels

Got these mussels from friends who have just come back from their nice holidays on Goa..
My friends know how much I love all kinds of mussels and shells from all around the world, especially when they are still in pairs..
I collect them and usually put them somewhere in the living room or in the study, they make thinking and working easier maybe because there is something positive about them.
I have never seen greenish shells before, and they are so tiny..will put them to a special place.
My macro isnt really good enough and the lights in the flat neither..thats why I couldnt capture the full green!