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Jade Carving & Necklace

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A Nephrite Bangle

Caroline from USA sent me a number of pictures asking me to identify the jade pieces.

From the pictures, the jade pieces can be identified as Nephrite Jade.

A Nephrite Pendant strung on a necklace of Nephrite Beads

Nephrite Jade has a more fibrous composition unlike Jadeite Jade where the internal structure is more sugary and granular.  Nephrite is more ‘greasy’ looking and the typical color is darkish green.  Nephrite Jade occurs in other colors of russet brown, whitish, celadon and black.  Mottled Green in Nephrite is also quite common, that is, dark spots may appear within the jade piece.  So far Nephrite does not have lavender color.

This is a typical color of Nephrite jade
A beautiful twin fish carving on Nephrite Jade

If you can unhook the clasp from the jade pendant, then perhaps you can test for the specific gravity.  SG of Nephrite is around 2.95.  Any high school students will be able to help you determine the SG of a small piece of pendant.

Dark green spots are quite typical of Nephrite Jade

Or perhaps you can test for the Refractive Index of the Nephrite Jade.

For more details on the differences between Nephrite and Jadeite Jade, you can read my post, here.

A Arthur Lau


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I am a Graduate Gemologist trained at the Gemological Institute of America (GIA) in New York City, USA. I hold an MBA degree from Cranfield University, United Kingdom, and a Bachelor degree in Mathematics. My earlier profession was a banker until I found jade in Myanmar (Burma) in the early 90s. I have traveled to the fabled Hpakan Jade mines, and Mogok, the world’s famous rubies and sapphires mines in upper Burma, with my second son. Three of my children are also Graduate Gemologist, GIA, NYC and they deal in diamonds, gemstones and jade. 我是在美国纽约市的美国宝石学院(GIA)接受过培训的宝石研究学家。 我拥有英国克兰菲尔德大学的工商管理硕士学位和数学学士学位。我以前的职业是银行家,直到90年代初我在缅甸接触到玉石。我曾经和我的次子一起去过缅甸上流传说中的哈帕翡翠矿山和莫谷矿山, 莫谷矿山是世界上著名的红宝石和蓝宝石矿山。我的三个孩子都是纽约市GIA毕业的宝石研究学家, 他们专门处理钻石,宝石和玉石.