Rough Green Tourmaline Value Guide

This Brazilian Rough Green Tourmaline is a million-year-old natural mineral specimen prized for its raw, uncut crystalline form. Historically mistaken for emeralds by 17th-century Dutch traders, these authentic pieces represent the 'turamali' heritage of stones with mixed colors.

What affects the value of Rough Green Tourmaline?

• The size and weight of the specimen, with larger intact crystals commanding higher prices.
• The clarity and transparency of the green hue when held up to a light source.
• The presence of well-defined terminal ends on the crystal, which increases collectibility.
• The overall saturation of the green color, with more vivid tones reaching the $500 value mark.

How to Identify Rough Green Tourmaline?

• Look for the characteristic elongated prismatic crystal structure with vertical striations along the sides.
• Verify the origin as Brazil, a premier source known for producing high-clarity green specimens.
• Check for the natural 'rough' state, which should show no signs of artificial cutting or polishing facets.
• Observe the color depth, which can range from pale mint to deep forest green within a single crystal.

History of Rough Green Tourmaline

Tourmaline has a rich history, dating back to ancient times. It was first brought to Europe by Dutch traders in the 17th century, who found it in Sri Lanka. It was mistaken for emeralds for many years due to its varying green hues. The name 'tourmaline' comes from the Sinhalese word 'turamali', meaning 'stone with mixed colors'. This gemstone is known for its wide spectrum of colors, making each piece unique.