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Unheated Ceylon Sapphire 2.30

cold sky blue rectangular pyramid cut sapphire from Ceylon, unheated and natural, no window, IGI rep
more images
Price:
$4,400.00
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2.30 Carat
Cold Sky Blue
Light Medium 40
Lightly Included

Details:

GRADING REPORT PBS230

- Identification: Natural Unheated & Untreated Sapphire
- Carat: 2.30
- Shape: Rectangular Pyramid
- Measures: 7.30x6.25x5.27 (millimeter)
- Color Grade: Good
- Tone: Light Medium 40
- Color Zoning: Visible but mobile (theoretically not zoning)
- Clarity: Lightly Included -- (one inclusion the girdle)
- Cutting Grade: Very Good+ (see comment)
  > Brilliancy: 90%
  > Depth: 72%
- Origin: Sri Lanka
Treatment: None

Certificate No: IGI 332895782 (see 'more images')

Overall Grade: Good+

Comment: Here is an extra wild glitter sapphire for those who, budget aside, want something other than the common snob's cornflower or royal blue :-) A full-sized surprising gem with more sparkle and color-shifts/zones than one might think possible within 7x6mm. Do not take the IGI-report's photo as guidance though; this deep blue is visible only under strongest light (or lowest mood) and is not the major attraction. The WoW in this gem goes to the unpredictable and intense luster. For those who are interested in the aspects of a gem's magic: the curious play of light in this sapphire is caused by the unconventional pyramid cut, which itself is interrupted by additional cross-facets towards the culet. There, in the double-twisted pyramid, light-rays are re-splintered and reflected like rubber-balls in a 3D-snooker-table. Lacking a window to escape through the back (tata!), most light is thus caught inside until it finds an exit through gem's table and back into the room. The crafty lapidary, following what nature had presented, probably the tip of a giant crystal, did a terrific job closing the back, moving one inclusion into the almost invisible outer girdle (can be hidden in a bezel setting), while maximizing luster in the correct color-axis. All by hand and feel! No CAD or even a pocket calculator. 

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