Cobalt Spinels

Explore the spinels listed as cobalt in our catalogue. View the individual stones and compare their photographs, dimensions, cuts and weights. These listings also appear in the Blue Spinels collection.

Ask for available laboratory documentation supporting cobalt content and treatment information for the specific stone. Colour alone cannot verify cobalt content. Enquire about a stone, or browse all spinels.

Find your colour.

Browse the colours described in our listings. Cobalt listings also appear under Blue; colour alone does not verify cobalt content.

6 products

6.71ct Natural Cobalt Spinel 6.71 ct Spinel — Cushion Cut — listing image 3

6.71ct Natural Cobalt Spinel | Massive Tanzanian Cushion | Untreated COBS27

$16,675.00
$16,675.00
2.31ct Natural Cobalt Spinel2.31ct Natural Cobalt Spinel | Flawless Blue Tanzanian Oval Cut COBS26

2.31ct Natural Cobalt Spinel | Flawless Blue Tanzanian Oval Cut COBS26

$8,337.00
$8,337.00
1.12 ct Spinel — Cushion Cut — listing image 11.12ct Natural Mahenge Cobalt Spinel – Royal Blue Cushion Gemstone COBS16

1.12ct Natural Mahenge Cobalt Spinel – Royal Blue Cushion Gemstone COBS16

$1,025.00
$1,025.00
0.98 ct Spinel — Cushion Cut — listing image 10.98ct Natural Mahenge Cobalt Blue Spinel – Rare Cushion Cut Gem COBS15

0.98ct Natural Mahenge Cobalt Blue Spinel – Rare Cushion Cut Gem COBS15

$1,155.00
$1,155.00
1.32ct Royal Blue Mahenge Spinel Rare 1.32ct Royal Blue Mahenge Spinel – VVS Cobalt Gemstone COBS8

Rare 1.32ct Royal Blue Mahenge Spinel – VVS Cobalt Gemstone COBS8

$1,501.00
$1,501.00
Vietnam Cobalt Spinel Rare color

2.08ct Natural Vietnam Cobalt Spinel - Loupe Clean Emerald Cut - COBS 01

$9,621.00
$9,621.00