GEMSTONE LIBRARY
BERYL
Beryl is a mineral that can take on any colour. Beryl with no colouring element is colourless (goshenite). Green beryls are coloured by iron (green beryl) or chromium and/or vanadium (variety of emerald). Yellow beryls (heliodore) are coloured by iron. Pink (morganite) or red (bixbite) beryl is coloured by manganese.
Each gemstone brought to the laboratory is analysed and identified so that the related report can be drawn up.
CHARACTERISTICS
- Name: Beryl
- Mineralogical nature: Beryl
- Colour: Colourless (goshenite), yellow (heliodore), pink (morganite), green (beryl green or emerald), red (bixbite), black, etc.
- Crystal system: Hexagonal
- Chemical composition: Be3Al2(Si6O18)
- Causes of colour: Fe2+, Fe3+, Mn2+, Cr3+…
- Density: 2.68 to 2.77
- Hardness: 7.5
- Cleavage: None
- Fracture: Conchoidal
- Optic sign: Negative uniaxial
- Refractive index: no: 1.574 to 1.600 / ne: 1.568 to 1.592
- Birefringence: 0.006 to 0.009
- Dispersion: 0.014
- Pleochroism: Clean if coloured stone
- UVL: Inert
- UVC: Inert
- Treatments: Irradiation / Thermal treatment
- Syntheses: Anhydrous Dissolution / Hydrothermal Dissolution
- Geographical origin: Madagascar, Brazil, USA, Russia, Ukraine,
CONTACT US :
contact@lfg.paris
(+33) 01 40 26 25 45
30, rue de la Victoire - 75009 Paris
Monday - Thusday : 9H30 to 17H00
Friday : 9h30 to 16h30
Withdrawal files at same days and time
