Rose quartz is the pink, translucent variety of quartz. Wikipedia explains that it grows as a solid mass rather than as distinct crystals, and owes its colour to microscopic fibres of a silicate mineral related to dumortierite, although rutile was once thought responsible. It formed at around 400 to 700 °C in the quartz cores of pegmatites, can show a star effect when cut as a sphere or cabochon, and is widely carved and set as a semiprecious gem. A distinct kind, known as pink quartz or euhedral rose quartz, does grow as clear, well-shaped crystals and fades in light. Hall calls rose quartz a stone of unconditional love and of peace, and ranks it first among crystals for the heart. She associates it with attracting love, restoring trust and harmony between partners, loving oneself, forgiving oneself and comfort in grief, and suggests keeping it beside the bed or in the part of the home given to relationships. Cunningham, writing within his quartz entry, gives it a receptive energy and uses it to stir love, wearing a heart-shaped piece to draw it, and to foster peace, happiness and fidelity in a settled relationship.