Guarantee Grade A Quality Jadeite Pendant with Agate Chain. 100% natural, no any treatment, grade. 26x 17.5mm x 15mm. Let's have a look at what's A, B, C grade jadeite jade. A grade jadeite jade: all natural jadeite, without any treatment. This type of jadeite jade can be bought as a real precious stone or investment. B grade jadeite jade: the natural jade is soaked in a mixed strong acid solution. Next, soak it in epoxy resin mixed with hardener. Then take it out and heat it to harden it. This kind of treatment can improve the color and transparency of the jade. But its texture is ...