| Blue Topaz is the hardest of the silicate minerals. While pure Topaz is colorless, minor changes of elements within the stone result in a variety of other colors, such as blue, pale green, red, yellow and pink.
The blue hue is created when Topaz is heated, whether the heat source is natural or engineered by man. The three shades of Blue Topaz are Sky, Swiss and London Blue. The latter is the deepest blue. . History & Lore The name derived from the Sanskrit word "tapas," means fire. Blue Topaz was considered by ancient civilizations to have cooling properties. Not only was it believed to cool boiling water when thrown into the pot, but to calm hot tempers also. Blue Topaz gemstone was credited with many healing powers, among them the ability to cure insanity, asthma, weak vision and insomnia. The Blue Topaz was even thought to have magical properties in its ability to make its wearer invisible in a threatening situation.
The Egyptians said that blue topaz was colored with the golden glow of the mighty sun god Ra. This made blue topaz a very powerful amulet that protected the faithful against harm. The ancient Greeks believed that it had the power to increase strength and make its wearer invisible in times of emergency. Blue Topaz was also said to change color in the presence of poisoned food or drink. Its mystical curative power changes with the phases of the moon and said to cure insomnia, asthma, and hemorrhages.
All, Our Rare Von Venner Topaz, Was Over Millions Of Years, Heated To Form The Gemstones Color, Naturally.
Properties: Blue Topaz
- Chemical formula: Al2SiO4(F,OH)2
- Color: light to dark blue
- Crystal system: orthorhombic
- Cleavage: [001] Perfect
- Fracture: conchoidal
- Hardness: 8 mho's
- Luster: glassy
- Streak: white
- Diaphaneity: Transparent
- Specific gravity: 3.49–3.57
- Optical properties: Biaxial (+)
- Refractive index: nα = 1.606–1.629
- nβ = 1.609–1.631
- nγ = 1.616–1.638
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