Opals
Gemstones
Jewelry
Coins
You have not bid on this auction.
AIG Certified 3.27CT high Quality Natural Cobalt Spinel fromTanzania
- SKU
- AMG. Pp
- Dimensions (mm)
- 9.09 x 7.69 x 5.77mm
- Weight (cts)
- 3.27
- Certificate Gem Lab
- AIG
- Shape
- Cushion
- Type
- Faceted
- Clarity
- VVS
- Certified Gemstones
- Yes
- Colours
-
AIG Certified 3.27CT high Quality Natural Cobalt Spinel from~Tanzania
Stone:(Cobalt Spinel)
Cobalt spinel usually refers to a gem-quality spinel mineral colored by cobalt. It is famous for its incredibly vivid electric blue hue—often considered one of the most striking blues in the gemstone world.
What It Is
Chemical family: Spinel (MgAl2O4)
Color agent: Trace amounts of cobalt substituting into the crystal lattice
Typical color: Intense, saturated, neon-like blue (sometimes called “cobalt blue spinel”)
Why It’s Special
The blue is exceptionally pure, vivid, and bright—often compared to high-quality sapphires.
Cobalt-bearing spinels are rare, especially in clean, well-saturated stones.
They fluoresce strongly under some types of light due to the cobalt content.
| Provider | Destination | Cost |
|---|---|---|
| Standard Shipping - Tracked Default |
Rest of World
25 days
|
first item
per additional item
shipping capped at
|
| FedEx |
Rest of World
10 days
|
first item
per additional item
shipping capped at
|
| Standard Shipping - Tracked Default |
Pakistan
20 days
|
first item
per additional item
shipping capped at
|
| FedEx |
Pakistan
5 days
|
first item
per additional item
shipping capped at
|
- SKU
- AMG. Pp
- Dimensions (mm)
- 9.09 x 7.69 x 5.77 mm
- Weight (cts)
- 3.27
- Certificate Gem Lab
- AIG
- Shape
- Cushion
- Type
- Faceted
- Clarity
- VVS
- Certified Gemstones
- Yes
- Colours
-
AIG Certified 3.27CT high Quality Natural Cobalt Spinel from~Tanzania
Stone:(Cobalt Spinel)
Cobalt spinel usually refers to a gem-quality spinel mineral colored by cobalt. It is famous for its incredibly vivid electric blue hue—often considered one of the most striking blues in the gemstone world.
What It Is
Chemical family: Spinel (MgAl2O4)
Color agent: Trace amounts of cobalt substituting into the crystal lattice
Typical color: Intense, saturated, neon-like blue (sometimes called “cobalt blue spinel”)
Why It’s Special
The blue is exceptionally pure, vivid, and bright—often compared to high-quality sapphires.
Cobalt-bearing spinels are rare, especially in clean, well-saturated stones.
They fluoresce strongly under some types of light due to the cobalt content.
| Provider | Destination | Cost |
|---|---|---|
| Standard Shipping - Tracked Default |
Rest of World
25 days
|
first item
per additional item
shipping capped at
|
| FedEx |
Rest of World
10 days
|
first item
per additional item
shipping capped at
|
| Standard Shipping - Tracked Default |
Pakistan
20 days
|
first item
per additional item
shipping capped at
|
| FedEx |
Pakistan
5 days
|
first item
per additional item
shipping capped at
|
Gemstones have attracted humankind since ancient times, and have long been used for jewelry .
-
PositiveVery nice cut and color gemstone. Arrived on time. Thank you so much!
-
Positive
Nice gem
Why are users outbidding themselves?
When a bid is placed, this is the maximum amount a person is willing to bid for the product. Our system will then automatically bid on behalf of the bidder, incrementally increasing the bid up to the maximum to maintain their position as the highest bidder.
When there is an icon indicating 'Automatic Bid', it means our system is actively placing bids for the bidder based on their maximum bid. This may appear as if bidders are outbidding themselves, but it's simply a result of the system updating the bid to reflect the bidders maximum limit.
Audit
-
Description Accurate
-
Pictures Accurate
Comments
After thorough evaluation of the Verified seller's information provided, Gem Rock Auctions has found accurate and honest pictures and details for this listing. Gem Rock Auctions is committed to holding our sellers to the highest standards of integrity and transparency. As part of this policy, we only permit the sale of natural, earth mined, gemstones. Manmade, synthetic, and imitation gemstones are not permitted on Gem Rock auctions. Many Gemstones have received treatments to enhance their color and/or clarity to further emphasize their beauty and we insist treatments are disclosed. Unless accompanied by a report from an approved laboratory, all origins or treatments declared in the listing are the sellers' opinion. There are limitations to what can be determined without physically handling the listed item.
