Mango season

It's mango season here or rather at the trade partner countries of Qatar - the other day I was at the supermarket and there were a lot of kinds of mango for sale : Indian , Pakistani , Yemeni , Brazilian . The Indian was the cheapest around 2.5 US dollars per kilo . I found a site with very good mango recipes . I mixed some thick cream , with fresh mango puree and some yoghurt and topped it with whipped cream . Some gelatin powder would have made it professional looking gourmet dessert - but I could not make out how to use that strange stick which is sold here
for making jelly . It is made in India and there is no any instruction on it - I just guess that it is an algae the agar -agar .