Crimson
Brilliant_Rock
- Joined
- Apr 3, 2019
- Messages
- 1,282
Hi @Crimson, thank you for sharing your knowledge on jade. Learnt a lot today.
I chanced upon these 2 rings recently. Both are about 2.9mm thick. However, the lower one has a lighter yellow green rim. I have not seen this before. What could be the reason for this? I guess this will mean the colour is not "cun"![]()
Interesting! Thanks for sharing. Is this your own photo or from the dealer? From the reflection on the rings, I can see that the lighting source is more to one side and the difference is more obvious in the lower ring. The stone is thinner at the rim, and the colour is also not as saturated so the difference is exacerbated. As to whether it is a difference in homogeneity (cun) I have seen differences in homogeneity in cabochons, but that is not a desirable feature and it doesn’t occur like this - so evenly around the edge. Can you inspect the rim from the side and under different lighting conditions?
Do you know this dealer well, and is this type A with a credible cert?
Whenever I see odd rims, I worry that the jadeite may have been treated or filled - it might be a doublet or triplet or a hollow as discussed here.
Part II: The Trading and Grading of Jadeite - Page 2 | LotusGemology.com
Myanmar's fei cui mines represent the planet's principal source of fine fei cui jade. This article covers the mining, grading and trading of fei cui (jadeite).