rose gold plated necklace Evaluation of Ruby and Sapphire

1. colour

The colors of gems have differences in color hue, versadiging, 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, oranje rooi, dark red, pienk (pers) rooi, 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, geel, 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. Byvoorbeeld, die “cornflowersapphire produced in the Kashmir region has a hazy, purplish hue and a heavy blue, giving a velvety feel. It is the best sapphire.

In werklikheid, 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. deursigtigheid

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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Kom ons begin : mo@kingjy.com

 

Guangzhou -jingying fokus op pasgemaakte groothandel ringhalsbande armbande oorbelle sterling silwer 925 juweliersware,Sterling silwer vergul met 18K,14K,24K Geel goud,witgoud en roosgoud. Dit is in staat om sterling silwer juwele te pas,logo -handelsmerk of ander woorde deur lasergravure volgens die vereiste van die kliënt.

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