I absolutely love these, they are so completely beautiful and each has such beautiful individual colours.
They can be worn as a pendant 
Ocean Jasper is a form of Jasper and is  found in Madagascar. It is multi-coloured in shades of white, pink, blue, green, red, and brown,  said to be an excellent healing stone which encourages a feeling of joy and elevated spirits! helping to release negative feelings, and feel more optimistic.

Ocean Jasper