Goshenite
Variety Be3Al2Si6O18
About it
Colourless beryl, named for Goshen, Massachusetts. Clear and bright but with little fire, it was once used to imitate diamond and is now mostly a collector's stone.
- 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
- colourless
- Transparency
- transparent
- Cleavage and fracture
- imperfect basal; conchoidal to uneven fracture
Typical values: real specimens vary. For more, see mindat.org.