How are rubies and sapphires valued?

The value of rubies and sapphires is closely related to its particle size and weight. Gemstones under half a carat are more common and cheaper; if they exceed one carat, they are much more expensive, and those over 3 carats will rise geometrically. So how to estimate the value of rubies and sapphires? Let's learn together. The value estimation of rubies and sapphires can generally be divided into the following levels: less than 0.5 carats, fine grains, very easy to obtain, easy to use for group setting. The value of rubies and sapphires is closely related to its grain size and weight. Gemstones below carats are more common and cheaper; if they exceed one carat, they are much more expensive, and gems above 3 carats will increase exponentially. So how to estimate the value of rubies and sapphires? Let's learn together. The estimated value of rubies and sapphires can generally be divided into the following levels: less than 0.5 carats, fine grains, easy to get, very cheap for group setting; 0.5-1 carats, small grains, easy to get, can be used as small ring noodles, cheap 1-2 carats, medium grains, generally affordable, can be used as ring pendants; 2-3 carats, larger grains, higher value, high market demand; 3-5 carats, large grains, high value, rare; 5 Carats or more, very large, expensive and very rare.　　　　The cut is also an important factor affecting the value of rubies and sapphires. Rubies and sapphires are also very particular in cutting, including facets and plain faces; shapes include oval, round, emerald, pear, olive, and mixed shapes. The most popular is the mixed shape, that is, the wide oval shape. The evaluation of cut is not as strict as that of diamonds, and generally does not account for a large part of the value of gems, but if the cut is too poor, it will greatly affect the value of rubies and sapphires.　　　　 The value of ruby u200bu200band sapphire is cut to three points: 　　　　 1. Cut positioning: Because ruby u200bu200band sapphire are anisotropic, they have pleochroism. When cutting, the tabletop should be strictly perpendicular to the long axis direction to avoid the influence of pleochroism, so that the finished product can see the purest, jewelry-saturated color from the tabletop. This is the correct orientation. Otherwise, the color will be incorrect, and it will be variegated under the influence of pleochroism.　　　　2. Proportion and symmetry: No matter which cut type the gemstone uses, it must meet the standard requirements, and the symmetry should be good, not skewed. The ratio and angle of length, width, and thickness are very important and must meet the standards, because these standards are designed based on the refractive index of gemstones and the principle of total reflection of light to achieve the best results. If it is cut thin, it will leak light, the color will be lighter, and the dispersion effect will be poor. In the jargon, there is no 'fire headDarkness also affects 'Fire Head'.　　　　 Polishing degree: The quality of polishing will affect the luster of the gem. High-quality polishing makes the gems show stronger luster and shining starlight effect: For rubies and sapphires with three groups of oriented fibrous inclusions, the use of arc-shaped plain cutting can produce starlight effects. The cutting of this type of gemstone should not only consider symmetry and proportion, but also choose the correct direction and position so that the star of the finished product is in the middle. If the cut is not good, the value of skewed rubies and sapphires will be reduced.　　　　 The above is the information about rubies and sapphires summarized by the author for you. The information comes from the Internet. If there is anything wrong, please understand. If you need knowledge and understanding of gem setting, please pay attention to jewelry setting. Jewelry setting is waiting for your inquiry!