Emerald rough green

Emerald rough green: natural beryl crystal, intense color from chromium and vanadium, sourced from mines in Minas Gerais, Colombia, and Zambia.

About this subject

Rough emerald is the natural form of beryl before any cutting or polishing. Its characteristic green color comes from chromium and vanadium impurities within the crystal lattice. Hexagonal crystals can reach considerable sizes, but inclusions and fractures are common, reducing gemological value. The most famous deposits are in Muzo and Chivor, Colombia, where erosion exposes hydrothermal veins. In Brazil, Minas Gerais and Bahia produce emeralds with varied tones, while Zambia offers darker crystals with fewer inclusions. Artisanal mining still prevails in many deposits, with manual techniques that preserve the rock matrix. Rough emerald is valuable for collectors and cutters, as each crystal presents a unique cutting challenge to maximize brilliance and minimize imperfections.

Frequently Asked Questions

What is the difference between rough and cut emerald?

Rough emerald is the natural crystal extracted from rock, unaltered. Cut emerald has been shaped and polished to enhance brilliance and color.

Where are the largest rough emeralds found?

The largest rough emeralds come from Colombia, especially the Muzo and Chivor mines, and from Brazil in Minas Gerais.

Why do rough emeralds have inclusions?

Inclusions are mineral impurities or natural fractures that occur during crystal growth. They are common in emeralds and help identify their origin.