The GIA Laboratory issues the Diamond Dossier for loose, natural diamonds between 0.15 and 1.99 carats, in the D-Z color range.
GIA实验室为那些在D-Z的颜色范围中并且在0.15ct-1.99ct发行的钻石小证书是为那些零碎的自然生成的钻石颁发的。
The carbon atoms in a diamond form "3-D" bonds with their neighbors, resulting in a sturdy, pyramidlike, repeating crystalline structure.
钻石中的碳原子同它们的相邻原子形成“三维的”化学键，形成了一个坚固的、金字塔般的重复性晶体结构。
The application of diamond has always been a major R & D target in abrasives industry.
在磨料磨具行业中，超硬材料金刚石的应用一直是行业研究、关注的问题。
Diamond grinding wheel dressed with D cup wheel or diamond powder sintered bar could be used for finish grinding;
单用D杯型砂轮或金刚石微粉烧结棒法修整后的碟形金刚石砂轮适用于精密磨削；
The Raman spectra either did not show the diamond 1332 cm-1 peak or the peak was very weak, while the D-band and the graphite peak appeared clearly.
拉曼光谱要么不显示金刚石1332cm - 1峰，要么显示的峰很弱。但D带和石墨峰值却清晰可见。
The Raman spectra either did not show the diamond 1332 cm-1 peak or the peak was very weak, while the D-band and the graphite peak appeared clearly.
拉曼光谱要么不显示金刚石1332cm - 1峰，要么显示的峰很弱。但D带和石墨峰值却清晰可见。
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