Fluor-liddicoatite
Mineral Ca(Li2Al)Al6(Si6O18)(BO3)3(OH)3F
Also called Liddicoatite
About it
Calcium-lithium tourmaline; slices from Madagascar show triangular colour zones and three-rayed stars. Looks like elbaite and needs a lab test to confirm.
- Type
- Mineral
- Group
- Silicate (cyclosilicate), tourmaline group
- Formula
- Ca(Li2Al)Al6(Si6O18)(BO3)3(OH)3F
- Hardness (Mohs)
- 7.5
- Specific gravity
- 3–3.06
- Streak
- white
- Lustre
- vitreous (glassy)
- Crystal system
- Trigonal
- Colours
- pink, red, green, brown, multicoloured
- Transparency
- transparent, translucent
- Cleavage and fracture
- indistinct; conchoidal fracture
Typical values: real specimens vary. For more, see mindat.org.