Rose Quartz
Rose quartz is a type of quartz which exhibts a pale pink to rose red hue; this aries from traces of iron and titanium in the quartz. 
This stone is known as the 'love'stone' rose quartz aids peacefulness and calm in relationships. Said to ease stress and tension and assist sleep.
Approx. 2"- 2" and each one will vary due to their natural formation.