The cufflinks are expensive

Such as gold, chalcopyrite, these minerals, if a hard, rare, durable, transparent, and beautiful color characteristics, that is often used as decorations, commonly known gems, such as made of diamonds, rubies, sapphires. Rock, is a mixture of solid minerals or mineral, which is called the rock under the sea reef, reef and shoal, from one or more of the mineral composition, and structure of the aggregates with a certain structure, a few contain the remains or traces of biological (ie, fossil). Such as marble, granite, etc., can be made into vases, ashtrays, tables, brick and other household goods or building materials. Low-key luxury is a silent expression of mens cufflinks. Rock has three states: solid, gaseous (eg natural gas), liquid (like oil), but mostly solid material, the material is composed of the crust, constitute the main component of the Earth's lithosphere. Precious stone and what factors? Stones in the common gloss how many types?
Identification of how precious stone gems? Gloss: Gem of the surface reflection of visible light. Gem gem depends largely on the shiny surface of the refractive index, also depends on the degree of polishing stones. Shiny stones in the common types are: adamantine luster: the diamond surface shows a shiny type, is a non-metallic minerals in the strongest luster. Such as diamonds. sub-adamantine luster. This limited territory of the cufflinks has carried a man’s pursuit for the details.  Such as: Zircon luster glass: the glass as the sunlight reflected from the surface, most of the stones have a vitreous luster, such as ruby, emerald, crystal, topaz, tourmaline and so on. resin gloss. Such as: amber silky luster: a fibrous structure of the gem collection of the performance of a gloss. Such as tiger eye stone, cat's eye stone. metallic luster: a surface with the same luster as the metal. Such as hematite and so on.
Special luster types: oil sheen: some stones or some uneven cross-section showing a surface of jade luster. luster as soft jade pearl luster: a soft, shiny and colorful, common in the surface of pearl or moonstone surface. waxy (earthy) luster 5. Output of cat's eye effect must have a gem what conditions? The materials of cuff links are not ordinary.  Definition: In some arc-type surface of the stones from one to the other with the obvious effect of light. The formation of cat's eye effect must have conditions: stones contain extremely rich in one direction was aligned inclusions; cutting and grinding stones inclusions formed parallel to the underside of the plane; gem must be cut into arc type, its length axis extending perpendicular to the direction of inclusion.. Star gem output effect must have what conditions? Star effect of classification?
Arc in the cut into some type of gem is usually seen in radiance, six shot, and the occasional twelve shooting star flash effect. Gold, platinum, silver, crystal, diamonds, gemstones and others are the guests of honor of the cufflinks. Effect the formation of stars must have the following conditions: stones must contain at least was very rich in both directions aligned inclusions; cutting and grinding stones arranged in the underside of the direction parallel to the inclusions formed by the plane; gem must be cut into the arc face. Star effect classification: six shooting stars radiance Star twelve shooting stars. Reason: with the formation mechanism of the same cat. However, due to two or more groups aligned inclusions or structural cause.
What is the gem of the color effect? Color effect is the gem in a different temperature, light, humidity and other external environment show different colors under the influence of the phenomenon is caused by external causes discoloration. So the cufflinks are expensive, from a few hundred dollars to ten thousand dollars.  How to identify: under fluorescent green, purple under incandescent light phenomenon, alexandrite, a color effect. What is the gem of the moon effect? Moonstone is a light from a special orthoclase and albite, and each occurrence of the reflection layer structure produced by an optical interference effect. 10. Gem how to define the hardness and toughness, hardness Mohs gem how to divide?