About Zinnwaldite
A lithium-iron rich mica, often greyish-brown to lilac. It's a stone of peace, tranquility, and transition, calming the mind (lithium influence) and aiding spiritual growth.
Primary Hues
Greyish-Brown, Yellowish, Lilac, Pale Violet, Grey, forms platy or pseudohexagonal crystals, often in greisens
Geological & Scientific Details
Zinnwaldite is classified as a phyllosilicate minerals, mica group mineral which typically crystallizes in the monoclinic system. Its chemical formula is KLiFeAl(AlSi3)O10(OH,F)2. Common crystal habits include well-formed short prismatic or tabular crystals, pseudohexagonal, in rosettes or fan-shaped groups; lamellar or scaly aggregates; disseminated..
Key Geological Properties:
- Mineral Category: Phyllosilicate minerals, mica group
- Chemical Formula: KLiFeAl(AlSi3)O10(OH,F)2
- IMA Symbol: Znw[1]
- Crystal System: Monoclinic
- Predominant Geological Color: Gray-brown, yellow-brown, pale violet, dark green, color zoning common
- Crystal Habit: Well-formed short prismatic or tabular crystals, pseudohexagonal, in rosettes or fan-shaped groups; lamellar or scaly aggregates; disseminated.
- Twinning: On composition plane {001}, twin axis [310]
- Cleavage: Perfect basal {001}
- Luster: Pearly to vitreous
- Streak: White
- Diaphaneity: Transparent to translucent
Associated Minerals
- Mica
- Lepidolite
- Muscovite
- Biotite
- Polylithionite
- Topaz
- Cassiterite
- Wolframite
- Fluorite
- Quartz
- Feldspar