Mostly long prisms, these beryl crystals can be found embedded and encrusted in pegamite veins of granite rocks. Locations for Aquamarine include Brazil, Nigeria, Australia, Burma, India, and Sri Lanka. Diamonds can be found as embedded, octahedron, dodecahecron or bubic crystals. Colorless and fine diamonds are cut for gemstones. The value of a diamond is determined by its purity, color, cut, and weight.
Diamonds occur in old volcanic vents, pipes or in placer deposits.
The largest producers of gem diamonds are South Africa, Russia, Namibia, and Australia. The largest producers of industrial diamonds are Zaire, Russia, and South Africa. Emerald is the green variety of beryl. Mostly long prisms, these beryl crystals can be found in or close to pegamite veins of granite rocks. Locations for Emerald include Columbia, Brazil, Zimbabwe, South Africa, and Austria.