A practical method to judge the quality of a Jadeite Bangle

A practical method to judge the quality of a Jadeite Bangle

How can you determine the quality of a Type A Jadeite Bangle? Hang the jadeite bangle with a string, take a slightly bigger jadeite pendant (cylindrical shape is preferred) and tap it. If the sound is clear and crisp like a copper bell with a pure deep metallic quality, then it is very possibly Type A Jadeite. Flash a light at the bangle from its side and if the Color Root is not continuous, meaning some color on the surface is different than in the middle of the jade, then it is more probably Type B.          Note:  1) Color Root is the color in the heart of the jade. 2) If the bangle is “washed” by strong acid which is Type B+A, then it will be difficult to be judged under 30X magnification. In this respect, listening to the echo is...

Read More

A Comparison between Jade and other Similar Precious Stones

There are many precious stones that are similar to jade but with quite different values. Sometime sellers might cheat you by selling these similar stones instead of real jade. The following is a comparison table: Name Hardness Density (g/cm3) Color Refractive Index Other Features Jadeite 6.5-7 3.34 Green, emerald green, white, red 1.66-1.68 Green color under Chelsea colour filter; absorption band in red and purple zone Nephrite 6-6.5 2.95 White, yellow, olivine, dark green, black, etc. 1.606-1.632,often 1.621 No response under Chelsea colour filter. Chalcedony 6.5-7 2.60 Green, light green, red, blue, milk white, etc. 1.535-1.539 Green color under Chelsea colour filter; absorption band in orange...

Read More