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Unheated Ceylon Sapphire 0.70 (BSE070)

blue precision cut extra brilliant sapphire from Ceylon, unheated and natural, no window, IGI report
more images
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0.70 Carat
Various Sky Blues
Light Medium 40-60
Free of Inclusions



- Identification: Natural Unheated & Untreated Sapphire
- Carat: 0.70
- Shape: Emerald
- Measures: 6.12x4.30x2.86 (millimeter)
- Color Grade: Good+
- Tone: Light Medium 40 to MD60
- Color Zoning: None
- Clarity: Free of Inclusions
- Cutting Grade: Very Good
  > Brilliancy: 75%
  > Depth: 67%
- Origin: Sri Lanka
Treatment: None

Certificate No: IGI 345841090 (see 'more images')

Overall Grade: Very Good

Comment: Though nothing but a blue sapphire, this gem, like the others from the parcel, turns out to be quite a chameleon. See the vastly different images it produced. Not on purpose, but simple during the normal process of varying light and backgrounds. I treble-checked that I didn't mix up of the raw photo-files, but, no, it is the same gem. A closer study revealed at least two reasons: A) a thinly silky crystal dramatically changing the gem's tone under different light-angles B) the main back facets are uncommonly symmetric either jumping into full reflection, or not, the tipping point is shown in the two handshots below: left the reflection starts, on the right fully mirrored. Thus, you can have an affordable sky-blue sapphire with various tones from Light Medium 40 to Medium Dark 60 - always a new gem to discover. Big enough for a lady's ring. No inclusions, even under the lens, no treatments, and no window, making our preferred quality standard.  


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