Rose Quartz Tumblestone. Quartz: SiO2 Rose quartz is a type of quartz which exhibits a pale pink to rose red hue. The color is due to trace amounts of titanium, iron, or manganese, Rose Quartz, with its gentle pink essence, is a stone of the heart, a Crystal of Unconditional Love. It carries a soft feminine energy of compassion and peace, tenderness and healing, nourishment and comfort. Rose Quartz is primarily a crystal of love and devotion. It is a natural birthstone of those born in Mid-autumn. It is a stone to bring love, new romance, and new relationships into your life. It is a powerful Seeker crystal.