Lagoon Tourmaline Blue

GEMOLOGICAL REPORT                                                        № 128
  Gemologist Olga Melikian | WA: https://wa.me/79990437349                            23/11/2025
  Telegram: @olgamelikianofficial | https://melikianjewelry.com                     


  Weight: ……………………………..…..…………………..…..  23.13 ct
  Measurements: …………..….………..…….   14.85x14.70x13.80 mm
  Сut: ………………………………………………..…………….   cushion
  Color / Color saturation: …..……  vivid blue | strong color saturation 
  Clarity: ……………………………………………….……….…eye clean


  IDENTIFICATION: …………………….……  Natural TOURMALINE

  TRADE NAME: ……………………………  LAGOON TOURMALINE 


  Geographic Origin: ………………………………..………  Afghanistan

  Treatment: ………….…………………  No indication of any treatment

RESULTS OF DIAGNOSTIC METHODS
   GEMOLOGICAL REPORT                                                      № 128
    Gemologist Olga Melikian | WA: https://wa.me/79990437349                          23/11/2025
    Telegram: @olgamelikianofficial | https://melikianjewelry.com                     

  10x Magnifying glass: ……………………………………………….…
  small areoles of gas-liquid inclusions, mineral inclusions. There
  are no cracks, no cracks on the surface, naif near rundist
  Refractive Index: …………………………………….… 1.620 - 1.640
  Polariscope: ………………………………………..…….. anisotropic
  Dichroscope: …………………………….. greenish blue / vivid blue 
  UV fluorescence: …………………………………… no fluorescence
  Chelsea Filter: …………………………….…………………………….
  Color change | Alexandrite effect (daylight | artificial light): …….no

   Microscope: Two-phase inclusions. Tubular inclusions. 
   No indications of any treatment.             

Special properties:
  Opalescence | adularescence | iridescence ………………………No
  Cats eye effect…………………………………………….……….…No
  Asterism……………………………………….………………………No

GEMOLOGICAL COMMENT

DETAILED GEMOLOGICAL COMMENT
To accurately determine the mining region, the gem report should be supplemented with  Raman microscope study, obtaining the spectrum of this tourmaline Paraiba, and comparing it with the base spectrum of tourmaline Paraiba from Mozambique.

Considering the characteristics of this Lagoon tourmaline:

  Weight: ……………………………..…………………………….…..  23.13 ct
  Сut: ……………………………………………..…………………….   cushion
  Color / Color saturation: ………..……  vivid blue | strong color saturation 
  Clarity: …………………………..………………………….…….… eye clean
  Geographic Origin: …………………………………..…………  Afghanistan
  Treatment: …………………………….…… No indication of any treatment

Recommended market value corridor (retail price) of Lagoon tourmaline  from Afghanistan weighing from 10 carat, eye clean clarity, and vivid blue white strong neon color, as of 23.11.2025:

2200-2500 $ per 1 ct

Note: the recommended market value corridor in indicated on this date. The price may change over time. The value corridor is an opportunity for the buyer/ seller to get an objective assessment of the value of this stone. With the receipt of new gemological research  data, the cost corridor may be revised.