The physical properties of a diamond

The physical properties of a diamond.

Cleavage. The diamond has a pronounced cleavage parallel to the octahedron faces. This is used for cutting (splitting) and grinding. When the blade applied to the diamond is lightly tapped in the direction of the cleavage plane, the diamond is split on …

The hardness of the stones

The hardness of the stones

From vector properties of minerals, especially gemstones, the most important thing is hardness. It is resistance, that minerals put when trying to scratch or wear them. Very soft minerals are known, that can be scratched with a fingernail or …

Hard and soft precious stones

Hard and soft precious stones

However, there is another division, which is worth writing a little more about. We will refer to it frequently in later chapters. “In this case, the hardness of the stones was chosen as the criterion.

As it should be …

Classification of gemstones

Classification of gemstones.

Bauer reported, adopted for K.. E. Klugiem the division of stones, precious on 5 class. The basis of this division is primarily the hardness of the stones, having a major impact on their price. The right gemstones (jewelery), distinguishing …