Colorless (D–Z scale) to fancy yellow, pink, blue, green, and brown, exhibiting adamantine luster and 0.044 dispersion.
Chemical formula
C (Isometric Crystalline Carbon)
Other Gemstones • Topaz (Nesosilicate)
Topaz
Naturally colorless, champagne-sherry (Skardu/Shigar pegmatites), golden-orange (Imperial), or rare natural cyclamen pink (Katlang, Pakistan); also vivid sky, Swiss, and London blue via treatment.
Al₂SiO₄(F,OH)₂ (Aluminum Fluoro-Hydroxyl Silicate)Mohs 8.0 Mohs
Mineralogical & Gemological Profile
| Mineral Family | Other Gemstones |
|---|---|
| Mineral Species | Topaz (Nesosilicate) |
| Gemological Variety | Topaz (Katlang Pink, Imperial, Champagne & Blue Topaz) |
| Chemical Composition | Al₂SiO₄(F,OH)₂ (Aluminum Fluoro-Hydroxyl Silicate) |
| Crystal System | Orthorhombic |
| Mohs Hardness | 8.0 Mohs |
| Specific Gravity | 3.49 – 3.57 |
| Refractive Index | 1.610 – 1.638 |
Color Characteristics & Optical Behavior
Naturally colorless, champagne-sherry (Skardu/Shigar pegmatites), golden-orange (Imperial), or rare natural cyclamen pink (Katlang, Pakistan); also vivid sky, Swiss, and London blue via treatment.
Geological Context & Pakistani / Global Localities
Pakistan is home to two world-famous geological types of topaz: (1) Hydrothermal calcite-hosted natural Chromium-bearing Pink Topaz from Katlang (Mardan District, KP), and (2) Miarolitic pegmatite Champagne/Colorless Topaz crystals from Shigar and Skardu (Gilgit-Baltistan).
Collector Interest & Rarity Factors
Natural untreated Katlang Pink Topaz and terminated Shigar champagne topaz crystals on matrix (which naturally fade if left in direct sunlight unless stabilized) are iconic Pakistani treasures.
Fine Jewelry Applications
Rings, pendants, and earrings; protective settings are advised due to basal cleavage.
Treatment Considerations & Disclosure
Natural Katlang pink and Imperial topaz are rare and prized unenhanced; almost all commercial blue topaz (Sky, Swiss, London Blue) is produced by irradiating and heating colorless topaz, and mystic/coated topaz has a surface film—all treatments are transparently disclosed.
Care & Cleaning Instructions
Topaz has one direction of perfect basal cleavage: NEVER clean in an ultrasonic cleaner or expose to sharp knocks or thermal shock. Keep natural brown/champagne pegmatite topaz out of prolonged intense sunlight.
Traditional Meaning
Traditional Symbolism & Cultural Heritage
Associated in historical lore with warmth, eloquence, and friendship. Traditional November birthstone.
Note: Cultural and birthstone traditions are presented strictly as historical folklore, never as scientifically verified medical or metaphysical effects.
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