Anahata (Sanskrit: अनाहत, IAST: Anāhata, English: “unstruck”) or heart chakra

The Heart Chakra is represented by a circular flower with twelve green petals called the heartmind. Within it is a yantra of two intersecting triangles, forming a hexagram, symbolizing a union of the male and female.

The seed mantra is Yam, the presiding deity is Ishana Rudra Shiva, and the Shakti is Kakini.
Anahata is related to the thymus, located in the chest.

The thymus is an element of the immune system as well as being part of the endocrine system.

It is the site of maturation of the T cells responsible for fending off disease and may be adversely affected by stress.

Anahata is related to the colours green or pink.

Key issues involving Anahata involve complex emotions, compassion, tenderness, unconditional love, equilibrium, rejection and well-being, joy and inner peace.

Physically Anahata governs circulation, emotionally it governs unconditional love for the self and others, mentally it governs passion, and spiritually it governs devotion.

Here are some crystals that relate to the Heart Chakra