gemstone
Citrine or Yellow Sapphire
Quartz (SiO2) or Corundum (Al2O3)
AI-generated identification · may be incorrectHardness: 7 (Citrine) or 9 (Sapphire). Color: Yellow. Luster: Vitreous. Crystal structure: Trigonal (both).
- Hardness
- 7 (Citrine) or 9 (Sapphire)
- Color
- Yellow
- Luster
- Vitreous
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Physical properties
Hardness: 7 (Citrine) or 9 (Sapphire). Color: Yellow. Luster: Vitreous. Crystal structure: Trigonal (both).
Formation & geological history
Forms in igneous or metamorphic rocks through hydrothermal processes or high temperature and pressure over millions of years.
Uses & applications
Primarily used in fine jewelry due to its attractive color and durability.
Geological facts
Many citrines on the market are actually heat-treated amethysts. Yellow sapphires are highly valued in Vedic astrology.
Field identification & locations
Identified by color, hardness testing, and refractive index. Common sources include Brazil (Citrine) and Sri Lanka (Sapphire).
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