A quarter is about 1" across.
First picture is mixed hearts, approximately 1.1" to 1.4" across. $5 each
2nd picture is of Carnelian Hearts, approx. 1.5" across. $6.50 each
3rd picture is of Ocean Jasper Hearts - approx. 1.5" to 1.6" across. $5 each
More hearts here: https://www.etsy.com/shop/MyDreamCrystals?ref=seller-platform-mcnav§ion_id=28887490