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What Is The Weight Of My Jade?


P-green ds

Hope all is well with you and your family!

I have a jadeite pendant in my collection and it’s about 21mms. Can you help me to determine how many carats it is and what do you think of the stone concerning its

I appreciate your help in this matter.

Thank you so much!

Sarah B.


Hi Sarah

Your green stone is set in a gold clasp and the weight of the stone cannot be determined.  Even if it is a loose jade, one cannot determine the weight of the stone even by knowing the full dimension of the jade. We have to use a gem weighing scale.

For Round Brilliant and Baguette Diamond, the approximate weight can be determined by using a 4 disc pocket gauge as shown in the picture below. Diamonds are almost cut to exact standard based on their gemological properties. Hence, when you place the gauge over a Round Brilliant Diamond you can get a good approximation of the weight of the stone. Or if you know the diameter of a Round Diamond you can check up the weight on the internet, for example, a 1 carat round diamond has a diameter of approximately 6.4 to 6.5mm.

diamond gauge

It is almost impossible to determine the authenticity of the jade by looking at an image. One has to sight the stone, feel it and see the texture or carry out some gemological tests on the stone.

The texture of the stone is identical to that of a jadeite jade as seen in the picture. The hue, tone and saturation of the jade are quite excellent. The color is also evenly distributed with no patches of cloudy white.  If it is a jadeite jade and is natural then this is a very good stone, though I can’t really put a value to it.

I hope the above helps.


Picture acknowledgement : www.allaboutgemstones.com




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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.