Gemstone Shop
Ask a Q
My Account
Ed Bristol
Ceylon Cobalt Spinel
Tanzanian Ruby
more images
back add to cart buy now

3.37 Carat
Cobalt Blue
Medium Dark 70
Very Lightly Included



  • Identification: Natural Unheated & Untreated Spinel
  • Carat: 3.37
  • Shape: Cushion
  • Measures: 10.11x8.45x5.48 (millimeter)
  • Color Grade: Excellent
  • Tone: MD70
  • Color Zoning: None
  • Clarity: Very Lightly Included
  • Cutting Grade: Excellent (precision cut by Peter T.)
    • Brilliancy: 85%
    • Depth: 65%
  • Origin: Sri Lanka
  • Treatment: None

Certificate No: GF14031452 & 10121719771 (pre re-cut at 5.59 carat) 

Overall Grade: Excellent+

Comment: Cobalt spinel is one of the rarest gems in the world (it is blue spinel in which the color is caused by a certain content of cobalt). This totally perfect 3.37 carat was recut by Peter T. from a 5.5 stone (see old cert). It has virtually no inclusions (hard to find under the lens), a huge face with no window, magic color that is found only in this type of spinel. Though the uninitiated might be tempted to compare it with fine sapphire, it does have its own character. For fun, compare the dimensions in the old certificate with the new dimensions, mark the weight loss, while the visual size of the stone (face) is only 1mm reduced and yet the window is gone: master cut.

Ask a question.

Note to self or cart:
back add to cart buy now add to wishlist

Natural Gemstones Only!

No Heat, No Radiation.
No Bleaching, No Oil.
No Filler, No Diffusion.
No BE, No Chemicals.

Nothing but... gems!

Made by Earth.
Workshop Window: (mouse-over->halt) 

Click YouTube in low right corner
to listen while window shopping.


Join the Club 

 Wild Fish Members
save up to 25%

Apply here!

Add to favorites

Call Toll-Free

 Show Other Currency: 

Site Mailing List 
Natural Gems Only - No Heat. No Radiation. No Bleaching. No Oil. No Filler. No Diffusion. No Chemicals.


Genuine testimonials since 2003

Call us TOLL-FREE from the US and Canada:

In case of technical problems,
drop us a note or let us call back.

In case we are out of the office, please leave a voice message and we will contact you.

Our Sitemap
 © Wild Fish Gems 2001 - 2014