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Untreated 'Croco' Ammolite Fossil-Shell 20.42

free from giant ammolite untreated with IGI report on fossil shell
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Price:
$1,100.00
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20.42 Carat
Green, Yellow, Orange
Iridescence
Play-of-Color

Details:

GRADING REPORT AMM2042

- Identification: Assembled Unheated & Untreated Ammolite on Fossil Shell
- Carat: 20.42
- Shape: One-sided Triangular Freeform 
- Measures: 25.21x25.15x3.65 (millimeter)
- Iridescence: Bright / Intense
- Color-Spectrum: Very Good 
- Shift & Range: Good
- Scaling: Croco 
- Shape: Very Good 
- Depth of Ammolite: 15% 
- Origin: Canada, Alberta

Treatment: None (assembled gem)

Certificate No: IGI 350866942

Overall Grade: Very Good

Comment: This is the other extreme of our new organic gemstone, ammolite, with a so-called 'croco' surface, splintered in little squares as opposed to the big undisturbed surfaces of this piece. Like most gems, especially organic ones, ammolite offers a lifetime of study, with new varieties, color shifts, and optical effects like iridescence and scaling. A short description of quality ranges can be found under the link above. In addition to the desired iridescence, this croco ammolite plays with yellow, green and orange, not only in each square but all over its entire surface. The triangular shape, with two straight and one mostly round side, offers itself for a pendant.  

P.S. As elsewhere noted, ammolite is evaluated by its own grading system with A) quality and intensity of iridescence, B) color-spectrum, C) shift & range of color, D) scaling plus E) shape and finally F) surface depth of the ammolite.  

P.S.S. With a limited supply of these fossils, it is thought to be depleted in two or three decades. Using a DeBeer-style approach, ammolite would be a much better candidate than diamond for a monopoly without the risk of overproduction in mid-century (a free hint for VCs out there).

 

 

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