mothers kitchen essentials rock sugar crystals mothers kitchen essentials use to sweeten any sort of beverage! cocktails coffees iced teas etc. slow cooked and made from pure sugarcane, these rock sugar crystals, also known as kalkand, are perfect for teas and other beverages as they sweeten without adding any flavor. traditionally, they are added to teas in india for their ability to slowly dissolve thereby giving your cup of tea or beverage its distinct flavor and levels of sweetness with each sip.