Renée Newman is a respected gemologist and author of several guides on gems and jewellery. Her books are used throughout the world as buying guides, sales-training tools, class texts and references for jewellery professionals.

"...clarifies the inaccurate concepts from the Internet. It contains abundant information and really deserves my recommendation." - Dr. Yung-Kuei Soong, The 6th President of Taiwanese Osteoporosis Assn. (TOA)

"...a complete, practical, and easy-to-read reference for osteoporosis prevention. As the founding president of the Taiwan Osteoporosis Association, I am delighted to recommend this book to you." - Dr. Ko-En Huang, Founding President of TOA