Small ball shaped buttons with hear shapes cut out of the top that allow the interior reflective twinkle aspect to shine through & provide additional brilliance.
Another great haul of buttons still on their original cards. or just barely still on the card as is the case in the last photo. Top buttons are much more detailed than I'd originally noticed & have an early Art Nouveau floral design over a green background. Gray buttons have a tiny butterfly in the design. bottom card of twinkle buttons with tinting.