Posted: 11 Mar 2011 09:40 PM PST
Each object is rarely attractive in the market for a long time before it can be copied or imitated. Gemstones to have copies of at least 6,000 years ago by a truth of materials which can be described as an imitation, stone or composite plastics.
Imitation look like natural stone, but they are usually very different in their composition and optical properties and physical properties. Can artificial sweeteners or natural minerals of similar color to the desired piece of jewelry. The glass is a favoriteStimulant used to imitate many different precious stones, because it can be prepared in almost any color and be molded or cut to shape. Most of the glass, but is much softer than the imitation of precious stones and badly cut with wear. You can also boil and has a distinct associations or swirly texture. Glass is only broken, it coincides with a refractive index from 1.5 to 1.7, no single mineral gem of refraction in this area.
The most commonly used to simulate the diamondlast 20 years, zirconium oxide, which was originally manufactured for use in laser and electronic research. More recently, synthetic moissanite come on the market. With its high refractive index and the fire are both difficult to detect by visual test only. to differentiate CZ from diamonds to its lower reflectivity and thermal conductivity. The thermal conductivity using a thermal probe.
Introduced last year in 1990, a synthetic moissanite is silicon carbidenew synthetic gem with properties that are closer to the diamond than any imitation. With a hardness of 9 on the Mohs scale, is much harder than ruby, sapphire or other precious stones, except diamonds. However, there is a significant difference given that the diamond is unique moissanite is doubly refractive and reflective. For this reason, seeing a doubling of the largest stones aspects pavilion. However, this is difficult without knowing the use of instruments when the stonesparticularly small and set in jewelry.
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