海量資源,盡在掌握
 寶石學(xué)基礎(chǔ)課程考試時(shí)將為你提供這張常數(shù)表材料折射率(RI)雙折射率相對(duì)密度(SG)琥珀1.54左右—1.05到1.10綠柱石各品種1.56到1.600.003到0.0102.65到2.80金綠寶石1.74到1.760.008到0.0103.71到3.75剛玉各品種1.76到1.780.003到0.0093.80到4.05鉆石2.42—3 (共 728 字) [閱讀本文] >>