研究显示，珍珠等级与文石层、文石微层、文石板块及其内部文石集合体有序度、致密度等均呈正相关关系。
The research shows that the grade of pearl has a positive correlation with ordering and compactness of layers, micro-layers, blocks and aggregates of aragonite.
研究显示，珍珠等级与文石层、文石微层、文石板块及其内部文石集合体有序度、致密度等均呈正相关关系。
The research shows that the grade of pearl has a positive correlation with ordering and compactness of layers, micro-layers, blocks and aggregates of aragonite.
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