Synopsis 1. Introduction/B.P. Radhakrishna. 2. Diamond exploration in India: retrospect and prospect/B.P. Radhakrishna. 3. Lamproites and Kimberlites in India/Barbara H. Scott Smith. 4. Kimberlites, Lamproites and lamprophyres of India: a petrographic atlas/Fareeduddin, V.P. Mishra and S.K. Basu. 5. Potassic rocks from the Gondwana Coalfields of India: closing Pandora's box of petrological confusion?/Roger H. Mitchell. 6. Panna Diamond Belt, Madhya Pradesh - A critical review/T.K. Rau. 7. Chelima Dykes, Cuddapah Basin, Southern India: a review of the age, petrology, geochemistry and petrogenesis of world's oldest Lamproites/N.V. Chalapathi Rao. 8. 40Ar-39Ar dating of the Kodomali Pipe, Bastar Craton, India: a Pan-African (491±11Ma) age of Diamondiferous Kimberlite emplacement/N.V. Chalapathi Rao, R. Burgess, M. Anand and D. Mainkar. 9. The diamondiferous Behradih Kimberlite Pipe, Mainpur Kimberlite Field, Chhattisgarh, India: Reconnaissance petrography and geochemistry/Datta Mainkar and Bernd Lehmann. 10. In-situ U-Pb dating of titanite in the Tokapal-Bhejripadar Kimberlite System, Central India/Bernd Lehman, Craig Storey, Datta Mainkar and Teresa Jeffries. 11. Non-kimberlitic diamondiferous Igneous rocks: 25 years on/Felix V. Kaminsky. 12. Petrology and geochemistry including Platinum Group Element Abundances of the mesoproterozoic Ultramafic (Lamproite) rocks of Krishna District, Southern India: Implications for source rock characteristics and petrogenesis/D.K. Paul, J.H. Crocket, T.A.K. Reddy and N.C. Pant. 13. Timmasamudram Kimberlite Cluster, Wajrakarur Kimberlite Field, Anantapur District, Andhra Pradesh/V. Srinivas Choudary, T.K. Rau, K.S. Bhaskara Rao, M. Sridhar and K.K. Sinha. 14. Tungabhadra Kimberlite Field, Kurnool District, Andhra Pradesh/S. Ravi, T.K. Rau, N.S. Reddy and S.S. Nayak. 15. New find of diamonds in Basna Kimberlite Field, District Mahasamund, Chattisgarh/S.K. Chellani. 16. Two new Kimberlites in Bommaganapalli Area, Anantapur District, Andhra Pradesh based on systematic stream sediment sampling and ground magnetic survey/Abhijeet Mukherjee, Ch. Sravan Kumar, K. Krishna Reddy, S.N. Siddiquie and Lokesh Chaturvedi. 17. Early cretaceous lamprophyre dykes from Nongchram Fault Zone, Meghalaya, Northeastern India/A.R. Nambiar. 18. Interpretation of aeromagnetic data of Panna and adjoining Area, Parts of M.P. and U.P., for evaluation of structural patterns favourable for emplacement of Kimberlite clan of rocks and estimation of depths of magnetic bodies/Rajendra Sharma, Ch. V.V.S. Murthy, B.V. Nagaraju, H.C. Gouda and R.K. Singh. 19. Hydrothermal synthesis of Nanosized crystals of diamond under sub-natural conditions/B. Basavalingu, K. Byrappa and P. Madhusudan.