Topaz

Topaz stone is a transparent mineral that comes in a variety of colors, including a colorless form. The most well-known topaz colors are blue and orange. The rarest are natural pink, red, and fine golden orange, sometimes with a pink tone.

• Chemical compound: Fluo-silicate of aluminum

• Mohs scale: 8

• Color: Naturally colorless or bronze to yellow; Can also be shades of red, orange, yellow, green, pink, blue, or light gray

• Crystal structure: Orthorhombic

• Luster: Vitreous (glass-like)

• Transparency: Most often transparent, but can be translucent

• Refractive index: 1.61-1.65, but may vary by color

• Specific Gravity: 3.49-3.57; Can vary slightly by color

• Cleavage: Perfect 1 direction; Basal

• Luminescence: Present; UV Fluorescence – UV Short in yellow, UV Long in beige

• Pleochroism: Present; Varies by stone color

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