The green chlorite in these crystals help to amplify the healing nature of quartz.  Green has long been thought of as healing on all levels.  Some say that this combination is one of the most powerful in the mineral kingdom.  I like to use this crystal to promote a deep meditation, by gazing at the chlorite phantom I feel at ease and protected, this allows me to skip into the meditative state more easily.  Some like to use this crystal with the heart chakra, I would like to suggest to use the heart chakras corresponding color pink to promote a balance in this chakra.  Rose quartz is a great choice.  These are very unique crystal is from Brazil. 

Chlorite Phantom Crystal Polished -2