Blue and light-blue spinel

Pair of electric blue cobalt spinels in octagon cut 2.11ct, Tanzania

Unique GRS type Peacok blue cobalt spinel in oval cut 1.52 carats, Tanzania

Cobalt blue spinel 1.47 ct in octagon cut from Tanzania

Cobalt blue spinel in ascher cut 0.92 carats, Tanzania

Сobalt blue spinel in octagon cut 1.01 ct from Tanzania

Contrasting pair of pink and blue cushion cut spinel 0.57 ct

Cushion cut blue spinel 1.66 ct, Burma

Cushion cut Burmese bluish gray spinel 1.04 ct

Cushion cut dark blue spinel 2.79 ct, Burma

Burmese blue cushion cut spinel 2.00 ct

Blue spinel in cushion cut 1.63 carats

Blue spinel in cushion cut 1.75 carats

Blue-violet spinel in oval cut 3.00 carats, Tanzania

Super rare Mahenge cobalt blue spinel in oval cut 3.02 carats, Tanzania

Cushion-cut blue spinel 2.13 carats, Tanzania

Rare cobalt blue spinel in octagon cut 2.11 carats, Tanzania

Octagon-cut cobalt blue spinel 1.05 carats, Tanzania

Rare electric blue cobalt spinel from Tanzania in oval cut 5.34 ct

Cobalt blue spinel in octagon cut from Tanzania 1.49 carats

Set of cobalt blue spinels in pear cut 2.02 carats, Tanzania

Blue cobalt cushion cut spinel 1.50 carats, Tanzania

Intense cobalt spinel in radiant cut 1.12 ct, Tanzania

Blue oval cut spinel 1.16 ct, Tanzania

Intense blue-violet spinel cushion shape 4.09 ct, Burma

Pair of greyish blue asscher cut spinels 0.61 ct

Pair of blue and cyan spinels in Asscher cut 0.57 ct

Burmese blue gray spinel in cushion cut 1.12 ct

Pair of blue-gray oval cut spinels 1.17 ct, Burma

Set of purple-blue Burmese spinel 2.18 ct

Asscher Cut Greyish Blue Spinel Set 1.69 ct

Octagon cut cobalt blue spinel 1.35 ct, Tanzania

Cobalt blue spinel from Tanzania 3.51 ct

Asscher cut blue steel spinel set 2.51 ct

Set of blue and cyan spinels in Asscher cut 1.87 ct

Cobalt blue spinel 2.45 carats, Tanzania

Unique octagon cut cobalt spinel 1.65 ct, Tanzania