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Diamond Clarity Characteristics – Part 2

A Guide to Reading GIA Clarity Plotting Symbols for Blemishes 🧐


The “clarity” out of the 4Cs is of essence for selecting a dazzling diamond, yet the various internal and external characteristics of a diamond would impact its clarity to different extents. In last month’s blog, we introduced “inclusions” (internal characteristics) as well as the diamond clarity plotting diagram on a GIA Diamond Grading Report. If you missed this highly informative article, read it here!

Each GIA Diamond Grading Report features a diamond clarity plotting diagram under the “Clarity Characteristics” section. This diagram maps out the inclusions and “blemishes” (external characteristics) of the diamond in red and green markings, indicating their size and position:

  • Red: most inclusions

  • Green: blemishes and/or naturals

  • Black: extra facets



Out of the 2 types of characteristics, we’ve talked about inclusions last month. This time we will delve into blemishes. Let’s see what those green and black lines represent, as well as the features, cause and appearance of each type of blemish!




Image credit: GIA.edu

Want to find out more about “clarity”? Read Laine Jewellery’s info section here which introduces the GIA Clarity Scale, its 6 categories and 11 specific grades.

Feel free to get in touch with Laine Jewellery for recommendations and advice on diamonds or customised rings! I offer free consultation services every Friday at my studio at Two ifc, bookings required. Interested parties please make a reservation through Whatsapp or Laine Jewellery’s Facebook page!


Whatsapp: +852 6819 2038

https://wa.me/85268192038


Email: info@lainejewellery.com


Elaine 💌