Quartz crystals with blue needles of Dumortierite inside. The locality, is western Bahia, near Vaca Morta Quarry, a remote and hard to reach area near the border with Tocantins state. - Photo: Jeff ScovilQuartz with Dumortierite inclusions
The Gachala Emerald is one of the largest gem emeralds in the world, at 858 carats g). This stone was found in 1967 at La Vega de San Juan mine in Gachalá, Colombia. It is housed at the National Museum of Natural Hi
Rough diamonds from the Argyle Diamond Mine Argyle produces diamonds in a range of colours, including white and champagne, but it is renowned as the world’s only consistent producer of rare pink diamonds.