1.42 ct. Oval Blue-Green Cat's Eye Tourmaline with a Sharp Silver "Eye" [TU-012] $75.00

Shape = Oval cabochon Color = Nice Blue Green cat's eye with sharp silver "eye" Clarity = translucent Size = 7.5x5 Weight = 1.42

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.