Shukla, Dr Atul. Color Stones - Understanding Gems, New Delhi: Gemological Institute of South East, 2018. Print. Ser. 1.With More than 12 Years of experience in Teaching and Research in the field of Diamonds, Dr Atul Shukla decided to write a Manual for easy comprehension of Color Stones, there identification, quality factors, Imitations, Treatment, for easy comprehension of Color Stones and its intricacies.