And where does a “starlight effect” come from? The reflection of light causes starlight by several sets of aligned needle-shaped tubular inclusions. That is if a gemstone contains a large number of needle-shaped tubular bodies and meets the following conditions:
Natural star gemstones, whose star lines are emitted from the depths, are scattered and irregular, with bright spots in the middle, which can also be called treasure light. The synthetic looks like floating on the surface, clear and bright, the rule of the star line, the position is centered, and there is no bright spot in the middle. If the same quality star ruby and sapphire is to be divided, it must be a star ruby.
Therefore, after the two conditions of starlight and ruby are superimposed, it naturally becomes the most precious variety of starlight silver grandma jewelry.
There are also quality points among the stars. The more common ones on the market are the four stars (cross star), the six stars and the twelve stars (double six stars): the more rays, the more precious. The cross star is already scarce, and the six-shot or more starlight is very rare. The particles of natural star gemstones are generally small, more than 2 carats are limited, and more than 5 carats are rarer.
Of course, in addition to the number of starlight rays, the starlight must also look bright and complete. Under the concentrating light tube, the fluorescent lamp, direct sunlight, ordinary light, the quality of the starlight is getting better and better through layer by layer. Secondly, the colored gems certainly have to look at the color and have conspicuous starlight, but the color of the gemstone should be bright enough; then the natural gemstones, especially the high-grade gemstones, will inevitably be embarrassing, but it is better to invest in collections that fewer cracks.
Color tonal saturation: The quality of the sapphire is pure and vivid, and the saturation is high. Brightness: The brightness of the kids’ bead jewelry color, as viewed from the countertop, as a percentage of the proportion of the entire crown. The ideal ratio for sapphire is 60% to 80%. Uniformity: The color of the quality is evenly distributed.
Polychromaticity: The degree of pleochroism of stone color observed from the countertop can be divided into four levels: no, weak, noticeable, and strong. Here we need to emphasize the color again. This piece is the most important indicator. Like a sapphire, we can divide it according to its color: cornflower blue (dark blue), ocean blue (sea blue), dripping blue (fresh blue), Sky blue (lake blue), light blue, gray-blue, etc., with the slight purple blue cornflower blue in the dark blue, which is more priority produced in Kashmir, it is also known as “Kashmir sapphire.”
Clarity is especially crucial for faceted gems, but since star sapphire is curved, we will not elaborate here. As long as its inclusions do not affect the overall aesthetics of the gemstone, after all, the severe inclusions will cause the gem to lose its value, such as cracks, and the less the pits, the better. Sometimes look at the contents of the gem from a different perspective.
In this microscopic world, you will find that there is infiniteness in it, which accommodates the vicissitudes of the whole nature. It is like an all-encompassing gem world, with no charm! The general cut does not account for a large proportion of the value of the gemstone, but the particularly rough and poor cutting will inevitably significantly reduce its value.
Usually the cut can be divided into good symmetry, better, generally, poor, and abysmal levels. Transparency is an essential factor in addition to color. Transparency is the top grade, and the more transparent the texture, the higher its value.
For the evaluation criteria of faceted gemstones and star gemstones, the rutile inclusions that form optical effects are different in optical properties from the surrounding corundum, so the transparency of star gemstones is not high. After all, it is because of its opacity that it is such a beautiful starlight effect. So for starlight gemstones don’t have to be too tangled with gem transparency.