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GFCO Certified 2.17 Carat Natural Loose Blue Cobalt Spinel From Tanzania
$1,200
£906.32
€1,046.94
CA$1,690.63
A$1,810.66
CHF 973.40
MX$21,991.58
NOK 12,299.39
SEK 11,261.01
DKK 7,822.56
About the Item
Faceted Cobalt Spinel
Weight : 2.17 Carat
Dimension: 7.78 X 7.42 x 4.48 Mm
Colour: Blue
Origin: Tanzania
Treatment: Non
Certificate: GFCO Certificate Available
Shape: Octagon
For years, gemologists thought the same iron-to-iron interaction that results in darker, greenish blue body colors in spinels also caused vivid blue hues. However, in 1984, scientists first identified cobalt as an additional coloring agent for highly saturated blue spinels. Research into how iron and cobalt work together to produce this coveted color continued into the 2000s. It turns out that high levels of cobalt and relatively low levels of iron create an intense blue color in spinels.
Cobalt Spinels are exceedingly rare, especially in larger sizes and with high clarity. This rarity significantly enhances their value in the gemstone market. They are predominantly found in Sri Lanka, Vietnam, and Tanzania, but even in these locales, they are considered an exceptional find.
The presence of cobalt gives it its unique hue, ranging from a rich, saturated blue to lighter shades with hints of violet. Spinels, including cobalt spinel, are relatively hard gemstones, scoring 7.5 to 8 on the Mohs scale of hardness. This makes them durable and suitable for use in jewelry.
- Creator:Gilt Gems
- Stone:
- Stone Cut:
- Weight:2.17 ct
- Dimensions:Width: 0.3 in (7.42 mm)Depth: 0.18 in (4.48 mm)Length: 0.31 in (7.78 mm)
- Style:
- Place of Origin:
- Period:
- Date of Manufacture:2025
- Condition:
- Seller Location:Peshawar, PK
- Reference Number:1stDibs: LU3328227884642
About the Seller
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