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 • Zircon (Nesosilicate)
Zircon (Natural Mineral)
Electric Starlight blue, cinnamon-honey, imperial red, forest green, and diamond-bright colorless, exhibiting sub-adamantine luster and strong double refraction (facet doubling).
ZrSiO₄ (Zirconium Silicate, with trace Hf, U, Th)Mohs 6.5 – 7.5 Mohs
Mineralogical & Gemological Profile
| Mineral Family | Other Gemstones |
|---|---|
| Mineral Species | Zircon (Nesosilicate) |
| Gemological Variety | Natural Zircon (Blue, Golden, Red & Colorless) |
| Chemical Composition | ZrSiO₄ (Zirconium Silicate, with trace Hf, U, Th) |
| Crystal System | Tetragonal |
| Mohs Hardness | 6.5 – 7.5 Mohs |
| Specific Gravity | 3.93 – 4.73 |
| Refractive Index | 1.925 – 1.984 (High Birefringence up to 0.059; Dispersion 0.039) |
Color Characteristics & Optical Behavior
Electric Starlight blue, cinnamon-honey, imperial red, forest green, and diamond-bright colorless, exhibiting sub-adamantine luster and strong double refraction (facet doubling).
Geological Context & Pakistani / Global Localities
Earth's oldest known mineral (with Australian crystals dated over 4.4 billion years old); found in alluvial gravels and syenitic/pegmatitic rocks in Pakistan (Gilgit-Baltistan/Astor/Chilas), Cambodia, Sri Lanka, and Tanzania.
Collector Interest & Rarity Factors
IMPORTANT GEMOLOGICAL DISTINCTION: Natural Zircon (ZrSiO4) is a prestigious natural silicate gemstone that formed billions of years ago. It has NO connection to 'Cubic Zirconia' (CZ, ZrO2), an inexpensive man-made diamond simulant invented in the 1970s.
Fine Jewelry Applications
Brilliant-cut rings, earrings, and pendants displaying fiery dispersion and prominent doubling of back facets.
Treatment Considerations & Disclosure
Most blue, golden, and colorless zircons are produced by heating natural reddish-brown zircon crystals; many earthy-red and green zircons are completely unheated.
Care & Cleaning Instructions
Facet junctions on zircon can abrade if rubbed against other gems ('paperwear'); store in individual padded pouches and clean with warm soapy water.
Traditional Meaning
Traditional Symbolism & Cultural Heritage
From the Persian 'zargun' (gold-colored), treasured since the Middle Ages for wisdom, honor, and restful clarity. Official December birthstone.
Note: Cultural and birthstone traditions are presented strictly as historical folklore, never as scientifically verified medical or metaphysical effects.
Other Gemstones
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Chemical formula
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Chemical formula
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