Syzygium cumini (L.) Skeels (Family- Myrtaceae) is commonly known as ‘Jamun’, it is widely used as a fruit and also drug. The seeds are popular choice as ingredient in anti-diabetic herbal formulations. This plant species is prescribed in material medica of Ayurveda, Unani and Shidda System of medicines as drug with the name of ‘Jambu’, ‘Jamun’ and ‘Naval Pattai’ respectively. The seeds of Syzygium cumini (L.) Skeels were evaluated to assess their quality in respect of identity, purity and strength. The commercial samples were resourced from Delhi, Hardwar and Ghaziabad markets. Evaluation is based on specific parameters and limits developed by standardising authentic samples of drug.