Emerald is the green variety of Beryl. It’s combination of durability, and rarity, matched with its stunning green color make this gemstone the most expensive of all other green stones. The darker, deeper, green specimens are the most coveted. Varieties of Emerald include Brazilian Emerald, Cat’s Eye Emerald, Colombian Emerald, Star Emerald, Trapiche Emerald, and Zambian Emerald. Significant Emerald deposits can be found in Colombia, and Zambia.