2.22 ct. Elongated Emerald Cut, Rich Forest Green Tourmaline [TU-135] $198.00

Shape = Elongated Emerald Cut Color = Rich Forest Green Clarity = Eye Clean Size = 17x4.5 Weight = 2.22

Tourmaline Gemstones

• Crystal system: Trigonal
• Chemical composition: Borosilicate complex
• Color: Green
• Hardness: 7.0 - 7.5
• Specific gravity: 3.06
• Refractive index: 1.62 - 1.64
• Dispersion: 0.017
• Pleochroism: pale green, dark green
• Enhancements: Some very dark green and dark blue green tourmalines are heated to lighten their colors. The treatment is permanent and only occasionally performed.