Unit 1 AN INTRODUCTION TO GEM AND GEMOLOGY Part 鈪?Text Part 鈪?Words and Expressions Part 鈪?Reading Material Part 鈪?Business Nature & Products锛堚厾锛塙nit 2 WHAT ARE SYNTHETIC DIAMONDS Part 鈪?Text Part 鈪?Words and Expressions Part 鈪?Reading Material Part 鈪?Products锛堚叀锛塙nit 3 COLOR Part 鈪?Text Part 鈪?Words and Expressions Part 鈪?Reading Material Part 鈪?Products (鈪?Unit 4 REFRACTIVE INDEX AND REFRACTOMETER Part 鈪?Text Part 鈪?Words and Expressions Part 鈪?Reading Material Part 鈪?Products (鈪?Unit 5 PRODUCTION PROCESS AND TECHNOLOGY OF JEWELRY Part 鈪?Text Part 鈪?Words and Expressions Part 鈪?Reading Material Part 鈪?Products (鈪?Unit 6 THE NOMENCLATURE OF JEWELRYS Part 鈪?Text Part 鈪?Words and Expressions Part 鈪?Reading Material Part 鈪?Introduction (鈪?Unit 7 MAINLAND CHINA锛欰 VAST MARKET FOR COLORED GEMSTONES Part 鈪?Text Part 鈪?Words and Expressions Part 鈪?Reading Material Part 鈪?Introduction (鈪?Unit 8 GEMSTONE APPRAISALS AND GEMSTONE VALUE Part 鈪?Text Part 鈪?Words and E