Every precious stone has its legendary source: Golconda for diamonds, Mogok for rubies, and the Muzo mine in Colombia for emeralds, the only one still producing stones after five centuries of uninterrupted activity. Since November 2009, exclusive mining rights for the Muzo mine have been held by Muzo International, a branch of Texma Group. Unique in the world of precious stones, the group deploys a mine-to-market process based on three fundamental criteria. Firstly, the guarantee of quality with a zero-resin policy. Secondly, authenticity certificates issued by prestigious Swiss laboratories. Thirdly, trackability as each stone is numbered and can be traced from extraction to sale. On January 26th 2010, Muzo mined a rough stone weighing 10.06 carats, which it had cut in its Bogotá workshops. From it emerged a 6.55-carat emerald of a dazzling, intense green that meets full quality criteria and is certified epoxy resin-free.