Garcinia indica is a tree from India whose edible fruit is used in various dishes as a seasoning. It has many common names, including Bhirand, Kokam, and Red Mango (though it is not a Mango). There are numerous uses for other parts of the plant, including dyes and preservatives from the rind, and lip balm and other uses for oil from the seeds.
Kokum in its traditional form is a relatively hard butter, although it is now available in various softer forms which make it easier to use in a wide range of applications. Our usual source of Kokum butter has a consistency quite similar to that of shea butter.
It is best used within cosmetic formulations along with other ingredients to make it more pliable when you are developing exotic body care products.