The chemical properties of diamonds is very stable, not easily soluble in acid and alkali. However, in a pure oxygen, the heated to 1770 degrees, they will decompose.Formal Gowns

In a vacuum, heated to 1700 degrees, it will be broken down into graphite. Diamonds are transparent , And translucent, while others are opaque.Evening Dresses

Gem-quality diamonds, it should be colorless and transparent, and flawless little or no defects can also be a slightly yellowish or very light brown, the most valuable natural color is pink, followed by blue and green.Wedding Dresses

Pearl: seawater or freshwater mollusks in the shell into the small impurities in the body, the mantle will be secreted by the stimulation of a nacre mainly calcium carbonate will be small impurity layers wrapped up.