Emerald
Variety Be3Al2Si6O18
Take care.
- Sensitive to heat: Keep it away from heat and sudden changes of temperature, including hot lights and ultrasonic cleaners.
About it
Green beryl coloured by chromium or vanadium. Nearly all are included and most are oiled to hide fractures, so keep them from heat, solvents, and ultrasonic cleaners. Colombia, Zambia, and Brazil lead production.
- Type
- Variety
- Group
- Beryl variety
- Formula
- Be3Al2Si6O18
- Hardness (Mohs)
- 7.5–8
- Specific gravity
- 2.67–2.9
- Streak
- white
- Lustre
- vitreous (glassy)
- Crystal system
- Hexagonal
- Colours
- green, bluish green, yellowish green
- Transparency
- transparent, translucent
- Cleavage and fracture
- imperfect basal; conchoidal to uneven fracture
Typical values: real specimens vary. For more, see mindat.org.