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Surface of Jadeite Jade

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A Cut & Unpolished Jadeite Jade Slice

As explained in the previous post, the internal structure of Jadeite Jade comprises very minute granules of monoclinic microcrystalline crystals inter-locked against each other.

One of the factors in determining the quality of a jade piece is how compact would these microcrystalline crystals interlocked against each other.  The more compact they are the finer would be the microcrystalline grains, the higher would be the quality of the jade piece.  A very fine grain jade piece can also be subject to a high glossy polishing which will give its surface a shiny outlook.

Examining Jade Boulders At Burma Jade Auction, Notice The Bucket of Water

One of the chief identifying characteristic of an unpolished jade would be the shiny reflections from individual crystals on the back of large or medium grain stones.  Hence, during the auction of jade in Burma, jade dealers normally carried a bottle of water to splash on the surface of the open window of a rough jade piece.  This would give you an idea on the texture of the jade grains and would indicate how the jade would look like after polishing.

Dimple Surface of a Jadeite Jade

Another identifying characteristic is that the surface of a jade piece is very dimpled even when the jade is polished.  One can see the dimple surface even using a 10X loupe (read here on how to use a loupe). If the texture is of high quality the dimples would be more ‘shallow’ and further apart.  Hence, jade is often waxed to hide these dimple surface.

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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.