The blemishes of the pearl

[Catherine Pearl]

图2 异质层暴露：物体表面暴露有棱镜层和其他异质层。
图3 层裂纹：珍珠层内部出现的裂纹。
图 4 薄珍珠层（可以透过珍珠核看到条纹图案）：
珍珠层的厚度非常薄，并且随着时间的推移其质量会明显下降。
图5 裂纹：表面可见的小裂纹。
图6 核裂纹：内部核已破裂。裂纹可能延伸至珍珠层。
图7 斑点：加工后出现的白色斑点状物体。它们表明珍珠层已经塌陷。

 

[Catherine Pearl]

Pearl Novice Growth Record – Defective Pearls

Fig. 2 Heterogeneous Layer Exposure: Objects with the surface exposing the prismatic layer or other heterogeneous layers.

Fig. 3 Layer Cracks: Cracks occurring inside the nacre layer.

Fig. 4 Thin Coating (Nucleus stripe pattern visible through):
The thickness of the nacre layer is very thin. Over time, the quality noticeably declines.

Fig. 5 Cracks: Fine cracks visible on the surface.

Fig. 6 Nucleus Cracks: The internal nucleus is already cracked. The cracks may propagate into the nacre layer.

Fig. 7 Spots: Whitish spots revealed through processing. These indicate signs of nacre layer degradation.