Rose Quartz is a pink silicon dioxide hexagonal crystal. It is the stone of LOVE. Love in all its guises: forgiveness, compassion, generosity, gratitude, etc. Love for self, humanity, animals, the planet, family, friends, romantic, etc.
This stone will remove feelings of isolation and focus your attention on what matters. Wearing this stone (especially in the form of a heart) will heal woundedness and reawaken trust. It releases and contains soothing vibrations that calm tension and dissipate anger. It is a stone of harmony and unity with the Heart Chakra.
You can never, ever have enough Rose Quartz in your environment.