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GEMSTONE LIBRARY

CITRINE

Citrine is a variety of quartz that ranges from yellow to orange to brown. It is mined in Brazil, Madagascar, etc. It can be formed by heating amethyst.

Each gemstone brought to the laboratory is analysed and identified. When dealing with citrines, heat treatments are undetectable.

CHARACTERISTICS

  • Name: Citrine
  • Mineralogical nature: Quartz
  • Colour: Orange to brown to yellow
  • Crystal system: Rhombohedral
  • Chemical composition: SiO2
  • Causes of colour: O2 – Fe3+
  • Density: 2.65
  • Hardness: 7
  • Cleavage: None
  • Fracture: Conchoidal
  • Optic sign: Positive uniaxial
  • Refractive index: no: 1.538 to 1.544 / ne: 1.547 to 1.553
  • Birefringence: 0.009
  • Dispersion: 0.013
  • Pleochroism: Clean to weak yellow to pale yellow
  • UVL: Inert
  • UVC: Inert
  • Treatments: Thermal treatment
  • Syntheses: Hydrothermal dissolution
  • Geographical origin: Brazil, Bolivia, Madagascar, etc.

CONTACT US :

contact-laboratoire@bjop.fr
01 40 26 25 45
30, rue Notre-Dame des Victoires - 75002 Paris
Monday - Thusday : 9H30 to 16H30
Friday : 9h30 to 15h30
Withdrawal files at same days and time

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