Berita perhiasan

rose gold plated necklace Evaluation of Ruby and Sapphire

Diposting di oleh Kingjy

1. warna

The colors of gems have differences in color hue, saturation, and color brightness, as well as differences in the uniformity of color distribution and the degree of multicolor.

The pros and cons of ruby ​​color hue are: pure red, orange red, dark red, pink (purple) red, with pure spectral red as the top grade; the pros and cons of sapphire color hue are: pure blue, purple blue, cream blue, ink blue, Green and blue, with pure spectral blue as the top grade. With the continuous addition of variegated colors such as brown, yellow, and gray, the color quality will be significantly reduced.

High-quality rubies should be pure red, dense and bright in color, uniform in tone, no obvious color bands, and no pleochroism when viewed on a vertical table. Misalnya, itu “cornflower” sapphire produced in the Kashmir region has a hazy, purplish hue and a heavy blue, giving a velvety feel. It is the best sapphire.

nyatanya, color evaluation is also a comprehensive reflection of clarity and cut quality. The color quality of red and sapphire is not only related to the reflection and transmission of the surface, but also to its internal reflection. Internal reflection can make gems produce a sense of sparkle, increase the brightness of the gems, and increase the concentration and vividness of the gems.

2. transparency

Faceted gems and star gems have different evaluation criteria. Except for star gems, the degree of transparency of gemstones is a very important factor in addition to color. The transparent ones are top-grade and their value is also high.

3. Cleaness

Cleanliness is especially important for faceted gems, and serious inclusions may lose their gem value. The inclusions of high-quality red and sapphire should be relatively small and inconspicuous, without obvious cracks, and do not affect the transparency of the gem. Faceted gems exhibit a certain internal reflection effect.

4. Cut and quality

High-quality red and sapphire should be cut in a suitable proportion, with good symmetry, and a smooth surface. The higher the quality of red and sapphire of the same quality, the higher the value.

Transparent gems are often cut into faceted styles, while extremely dark and opaque star gems are often cut into plain styles. For starlight gems, it is better to have clear star lines and the intersection of starlight as close to the center of the gem as possible.

 

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Guangzhou Jingying Fokus pada Kalung Cincin Grosir Kustom Gelang Anting Sterling Silver 925 perhiasan,Sterling Silver Gold berlapis 18K,14K,24K emas kuning,emas putih dan emas mawar.,merek logo atau kata -kata lain dengan ukiran laser sesuai dengan persyaratan pelanggan.

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