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Pt900 Cobalt spinel diamond ring from Tanzania with Japanese and German origin identification certificate 0.08ct D0.35ct Rare stone [Escole]

Pt900 Cobalt spinel diamond ring from Tanzania with Japanese and German origin identification certificate 0.08ct D0.35ct Rare stone [Escole]

¥140,000 - ¥140,000
¥140,000
¥140,000 - ¥140,000
¥140,000
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Pt900 Cobalt spinel diamond ring from Tanzania with Japanese and German origin identification certificate 0.08ct D0.35ct Rare stone [Escole]
Product description This Pt900 diamond ring features cobalt spinel from Tanzania, which has an overwhelming presence with the bright neon blue characteristic of cobalt.

When analyzing blue spinel, if an absorption band (iron band) due to iron (Fe) is confirmed, it is generally not possible to identify it as "cobalt spinel." However, this stone is an extremely rare genuine cobalt spinel, with no iron bands seen at all in spectroscopic analysis conducted by the attached Japan-German Gem Research Institute (JGGL), and only a pure "cobalt band" confirmed. It shows a strong absorption peak around 585 nm, and it has been scientifically proven that the main coloring factor is highly pure cobalt (Co).

Although it is a lovely size of 0.08ct, the clear cobalt blue with no hint of blackness (dark tone) shines with a strong shine from deep within the stone. Surrounding the main stone in the center and continuing to the arms, a total of 0.35 ct of carefully selected high-quality diamonds are placed in the line, and the neat sparkle of platinum 900 brings out the blue of the main stone even more vividly.

Among the blue spinels on the market, there are only a handful of individuals that have only a "pure cobalt band". As a rare stone jeweler, we are proud to offer this supreme gem, which combines high value and beauty, to collectors who seek genuine cobalt blue.

We will attach the video to our official online store and other embeddable channels (prices may vary), so we hope you will consider it.
SELBY contact number 260518-018
condition A


ring
material Pt900
size Width: approx. 5.6mm
Thickness: approx. 4.2mm
ring size No. 12
Adjustable size No. 10 to No. 14
total weight Approximately 3.7g

center stone
jewelry Cobalt spinel from Tanzania with Japanese and German origin identification certificate
weight Total 0.08ct
color aa+
clarity AA (relative evaluation of inclusions mostly derived from minerals)
shine AA+～AA

side stone
jewelry diamond
weight Total 0.35ct
color aa
clarity AA+～AA
shine AA+～AA

accessories
Japan-German Gem Institute Certificate of Authenticity/Certificate of Identification

Special notes
None
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