Out of the Blue | Blue Cobalt Spinel from Mahenge, Tanzania
“These blue crystals had superb colour saturation that rivaled the Luc Yen material, but we were still shocked to receive the lab reports that stated they were indeed ‘Cobalt Spinel’,” said Barber.
On a Hunt for Cobalt-Blue Spinels in Mahenge
Why blue cobalt-bearing spinels from Mahenge should be on your radar.