Nacre (Irregular flaky shell, grayish-yellow-brown exterior, gray-white iridescent luster interior, thin and easily separable fracture surface)
Nacre Slices
Scrap Nacre from Button Making
Crushed Nacre
Ground Nacre Shells (top) Mixed with Crushed Nacre (bottom)
Fake Pearls (Top: Genuine, Bottom: Fake made from Nacre Shells)
【Name】n
Zhen Zhu Mu (Nacre)
n 【Source】n
Song Kaibao
n 【Commonly Used Degree】n
E
n 【Botanical Origin】n
It is the nacreous layer of the shells of pearl oyster animals such as Pteria margaritifera (L.) and Pteria martensii (Dunker) of the Pteriidae family, or several species of river mussels of the Unionidae family.
n 【Characteristics】n
It is in the form of irregular flakes, varying in size and about 5 cm thick. One side is light pink with an iridescent luster, and the other side is milky white, smooth, and glossy; the surface has a white powder. The texture is loose and brittle, and it can be peeled off layer by layer. It has no odor and a bland taste.nnPteria martensii has a shell that is obliquely quadrangular, and the concentric growth lines on the shell surface are dense and flaky. The nacreous layer inside the shell has a very strong pearly luster, and the edge without the nacreous layer is different.nnSeveral species of river mussels of the Unionidae family:n(1) Hyriopsis cumingii is in the shape of a “triangular sail”, the shell surface has concentric rings, the shell shape is flat, and the two shells are equal, and the nacreous layer inside the shell is milky white;n(2) Cristaria plicata is an unequal-sided triangle, extending into a large “crown”, and the nacreous layer inside the shell is milky white to light blue, which can be distinguished.
n 【Processing】n
1. Raw Nacre 2. Calcined Nacre
n 【Identification】n
The best is white, smooth, and glossy.
n 【Chapter】n
Invertebrates