mineral crystal

The formation in geological process and geological significance of the ornamental stones have been studied here when we introduce those mineral crystal, rocks and fossils.

在介绍与矿物晶体类、岩石类和生物化石类有关的观赏石时，着重阐述了它的地质内涵和科学意义。

The calculation includes theoretical stress on breaking face of the mineral crystal material and theoretical tensile strength of the mineral fibrious material.

计算分矿物晶体材料断裂面上理论应力（解理应力）与矿物纤维材料理论抗拉强度两部分；

method of appraising ornamental stones of mineral crystal and jade

矿物晶体和玉石观赏石的评价方法

in terms of mechanical properties, the stronger the forces are, the greater is the strength and rigidity of the mineral crystal.

就力学性质来讲，这个力越强，矿物晶体的强度和刚性就越高。2.The glass of this watch is made of mineral crystal glass.这种手表玻璃是由矿物水晶玻璃。