Often referred to as a girl's best friend, diamonds are the world's most precious gems. For the scientist is a crystalline form of carbon that has great durability. In fact, the word diamond comes from the Greek word Adamas the person invincible.But a gift of diamond jewelry – a diamond engagement ring, bracelet, earrings or a pendant, a diamond is a symbol of love contrast to the other. That's why we should reflect on the importance of the symbolic significance of the diamond and diamond quality choose.There many different types of diamonds, based on how they formed and the process of their origin. They are broadly classified into three categories, natural diamonds, the diamond film fine diamonds.A natural and synthetic industrial diamond, is the most expensive, because it comes from nature. Based on the nature of impurities present in them, are further classified into four types.Type the 1st contains 0.3% nitrogen. This diamond is yellow or brown in color as it absorbs blue light. Ninety-eight percent of all natural diamonds are of this type. Type 1B contains 500 ppm of nitrogen and are yellow, orange, green or brown color.Type 2a is the purest form of a diamond. Because it contains few impurities or imperfections, it is usually colorless or translucent. Type 2b is the rarest type of diamond, only traces of nitrogen, which would give a bluish tinge.The price and quality of a diamond is determined by five basic criteria. The first is color. The diamonds are available in colors ranging from yellow to green to red and black. But the purest form, the second transparent ones.The is clarity. Most diamonds have some imperfections are called inclusions. The fewer inclusions, the expensive the diamond. A clarity grade is determined by the number, size, location and type of inclusions.Next cut. It is a diamond cutting and the number of facets that makes it shine. Some cuts of diamonds are renowned worldwide the Marchioness, the baguette, princess, radiant cut.The and weight of a diamond is measured in carats. Big, natural diamonds are extremely rare and because they have more weight than smaller ones that are most expensive. It is clear that only the very wealthy, these sparks beauties.The afford a diamond shape is different from the court. After a diamond is cut, the total perimeter must be formed. The most popular types are the droplet and the simple, classic round cut.There things to check when choosing a stone for that special someone. Some fluorescent diamonds, making it glow when illuminated. Check the artificial enhancements or treatments were performed, and that changes value. Insist on obtaining a certificate that the quality.The Cullinan diamond, the Hope Diamond and the Kohinoor diamond, the guarantees are some of the world's most famous stones in size, clarity and courage. But what the size, diamonds are one of the most anticipated gifts that a woman dreams of. When the time comes for you to make that major purchase, make sure you have the best quality you can afford to buy.