Home Jade & Gems Gemology How To Use A Jeweler’s Loupe

How To Use A Jeweler’s Loupe


Learning how to use a jeweler loupe properly is one of the most important skill that you have to acquire, whether you want to be a gemologist, a jeweler, a gemstones collector or a gemstone enthusiast.

Just a few pointers and you can handle a loupe like a professional diamond dealer.

A 10X loupe (magnification 10 times) is the standard used by jewelers.  Take note that under the Federal Trade  Commission of the United States, grading of diamonds must be done under a 10X loupe.  Any flaws, blemishes or pin-point inclusions that are not visible under a 10X loupe is considered non-existent.

Hence, if you read a GIA Diamond Grading Report the Clarity Grades assigned to the diamond is viewed under a 10X loupe.

You should invest a small sum of money in buying a good quality loupe as it goes a long way for you.

You should look for the following:


  • A triplet loupe which consists of 3 lenses composited together in such a way that edge and color distortion are eliminated.
  • Loupe should preferably be housed in black casing, not in chrome or gold, either which will affect the color of the stone you are viewing.










A 10X Black Casing Triplet Loupe (GIA)


How to handle a Loupe?

  • Hold the loupe between the thumb and forefingers.
  • Hold the stone with a tweezers.
  • Your thumb should rest against your cheek about 1 inches from the eye.
  • Slowly move the tweezers in front of the loupe until the stone is in focus. Your loupe should remain stationary.
  • As you progress, try to keep the other eye open (what we call the ‘dead eye’).  In this manner when you view a number of stones your eyes will not grow tired.

It’s just that simple.  But remember practice makes perfect.

Next articleDiamond and Graphite
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.


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