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UI
Smooth
All Google icons
talk
Linen
128x128
Free Website icons
Comment, Chat, talk
MediumTurquoise
64x64
Elegant Themes Icons
Chat, Bubble, speech
Gainsboro
48x48
Bloggers Vol 1-7
Chat, talk
LightSlateGray
512x512
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Quartz
twitter, birdie, talk
Developer Kit
hi, talk, Bubble
Green
talk, Chat, Comment
Comments, Chat, msg