While most emeralds on the market today have been enhanced in some way, untreated emeralds – referred to in the trade as "no oils" – are exceptionally rare, and when combined with a rich color and a clean crystal with very few/no inclusions, their rarity and hence desirability increases significantly. Top quality "no oil" emeralds of fine, transparent material are highly sought after today.

 

Emerald is the birthstone for May and the celebrated 35th Anniversary gemstone.

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