We all know that diamonds can be selected according to 4C standard. In fact, rubies can also be selected according to 4C standards and professional standards: color, clarity, cut and carat.
Look at the color to buy rubies, first look at the color. When choosing the color of ruby, we can choose from hue, lightness and chroma.
When judging the hue of ruby, the gem should be placed on a white background and observed from the table under natural light. Ruby can be divided into red, orange-red, maroon, pink, purple and so on, with pure red as the best.
Color is the life of ruby. If the color is a little worse, the price will be obviously different. The most famous ruby is "pigeon blood red", so pigeon blood red ruby is also the most precious.
We usually observe rubies from the table. When rotating, we should only see one color is the best. If you can see other colors, it means that the ruby is not oriented correctly during processing. In addition, uneven color will also affect the appearance.
When choosing the color of ruby, try to choose a deeper red color, because it can cover up the defects of ruby itself.
I believe everyone knows the saying "Ten Hong Jiu Cracks" in the second-selected rubies, which means that nine of the ten rubies will have cracks or be doped with some crystals and inclusions, which can be basically seen by the naked eye. These impurities and cracks will affect the purity of ruby.
When choosing the clarity of ruby, two aspects should be considered:
Whether the size, quantity, location, color and contrast of defects will affect the transparency of gems, such as small defects but wide distribution, will affect the overall transparency of gems and reduce the purity level of gems. 2. The influence of defects on the durability of gemstones, such as: large cracks are easy to damage gemstones due to bumping, which will also lead to the decline of clarity level.
We usually choose rubies with naked eyes. As long as there are no big flaws, no obvious flaws, few flaws and small cracks when buying, which will not affect the appearance and use, then we can choose with confidence.
Of course, some people choose rubies for collection, so they need to use a microscope. If you still can't see any flaws under the microscope, it means that this ruby is a first-class product and can be safely collected.
Pick three and cut three. Any gem needs polishing to be suitable for jewelry. You can have more perfect light after cutting. When choosing rubies, you should carefully observe whether the ruby you want to buy is finely cut.
Whether the cutting is fine or not can be considered from the aspects of cutting, proportion, symmetry and decoration. Cutting will not only affect the output of gems, but also affect the fire color and brightness of gems.
Under the illumination of the light source, you can see many small red "flames" flashing inside the ruby. High-quality ruby, fire color should account for more than 55% of the total crown.
For rubies, the more cutting steps, the better the fire color, but if a ruby adopts the best cutting, it will consume the weight of the ruby, so the better the cutting, the more expensive the ruby is.
When we usually choose rubies, we try to choose a symmetrical cutting surface, which has no obvious edges and corners to the touch. This ruby cutting is more perfect.
A quadruple ruby is the same as a diamond, and its weight is calculated in carats. The more carats a ruby has, the higher its unit price. In fact, the price does not determine the color of ruby, but in terms of particle size, the bigger the better.
We usually choose rubies, about one carat is enough, and the price of high-quality rubies above two carats will be very high. Generally, rubies for preservation are collected, and it is recommended to buy more than 3 carats.
Note: Carat-sized fake rubies are easier to make, so be sure to observe carefully when choosing them to see if they are genuine.