Colours and markings vary between crystals. This is for the Serpentine Crystal Heart from Peru, pictured.
About Serpentine Crystal Heart
Serpentine is a bright lime green to a dull olive-green crystal which relates to the Heart Chakra. Use Serpentine during mediation as it is great emotionally and will help with energy flow.
In addition, Serpentine is a great crystal for artists as it will help inspire creativity.