Cora Sun-Drop, claimed to be the world’s largest known vivid yellow pear-shape diamond. Mined in Africa. The diamond gained its color from the minimal amount of nitrogen in its carbon structure, making it extremely rare in nature.
Labradorescence Effect that causes a mineral to display dark, metallic-like color shimmers, usually blue and green. The name is derived from Labradorite, the mineral which is the primary example of this effect.
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