Jambu is a name given to many juicy, thirst-quenching fruits. They have diverse appearances and differ in size. The most commonly available is the bright red wax jambu or water roseapple. The variety with the most flavour is about the size of an apple, white with a pink blush on the riper side. The flesh is also white and slightly sweet.
Jaggery or gur. Palm sugar, obtained from the sap of, usually, the date or Palmyra palm. It is used extensively in Indian cooking and has a flavour reminiscent of Demerara sugar (US: light brown (granulated) sugar). Palm sugar is the better quality of the two.