常温下为黑色固体，在一定的温度下凝固成很脆的具有贝壳状断口的固体，呈玻璃相；
Soft pitch is a black solid at a certain temperature , it will be solidified into a brittle solid with shell-like fracture.
贝壳中的文石相在结合水和有机质的“调和”作用下，其相转变温度与天然文石相比下降了很多。
With the help of hydration water and organic matrix, the transition temperature of the aragonite in the shell is lower than the natural aragonite.
贝壳中的文石相在结合水和有机质的“调和”作用下，其相转变温度与天然文石相比下降了很多。
With the help of hydration water and organic matrix, the transition temperature of the aragonite in the shell is lower than the natural aragonite.
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