The ruby in zoisite represents the marriage of passion and patience

Also called anyiolite, ruby in zoisite is a crystal that contains the properties of both fiery ruby and earthy zoisite . This stone contains small ruby crystals embedded in green zoisite.

Ruby in zoisite increases psychic abilities , helps with communication, harmonizes the crown chakra, strengthens spirituality, brings physical energy to an exhausted organism. The ruby in zoisite helps you maintain your individuality while being a part of the world around you. It helps to calmly react to difficult life situations and manage stressful situations.
The ruby in zoisite transforms negative energy into positive . This is especially helpful during the process of recovering from a severe loss in life, as it helps relieve pain and suffering, brings comfort, and at the same time gives zest and passion to life.

Physically, ruby in zoisite calms an accelerated heartbeat while maintaining balance in the body, especially during times of stress. It reduces inflammation and supports the strength of the immune system, heart and lungs. The ruby in zoisite can help treat problems related to the reproductive organs, and is said to increase fertility in both men and women.

A stone with similar properties is ruby in fuchsite here:
http://www.nefertitis.cz/rubin-ve-fuchsitu-tromlovany/