mineral specimens
rare minerals
mineral dealer
systematic minerals
Black Hills minerals
fine minerals
mineral dealer
Dana minerals
IMA minerals
mineral collections
rock and minerals
gem crystal
0 item @ $0.00  

Polylithionite with Tainiolite

#PD34808

Polylithionite with Tainiolite

#PD34808
Availability
Sold
Size
3 x 2.5 x 2.5 cm - Thumbnail 
Formula
KLi2AlSi4O10F2 (RRUFF)
Locality
Lepkhe-Nel'm Mt, Seidozero Lake, Lovozero Massif, Kola Peninsula, Russia

Phyllosilicate - Monoclinic - Mica group member. End member. Ordinary (True or Common) Mica - Trioctahderal with lithium and aluminum in the (M) positions, Si and boron in the (T) positions, F>OH in the (A) position and K as the Interlayer cation.

Occurs as tabular crystals with hexagonal outline, also scaly, fine grained, white, gray, pale green, pale pink and violet. Can be fluorescent green. Typically found in alkaline syenites and their pegmatites including MSH and Ilimaussaq.

A nice specimen with colorless plates of Tainiolite.

Polylithionite

Formula
KLi2AlSi4O10F2 
Crystal System
Monoclinic 
Crystal Habit
Pseudo Hexagonal, Tabular, Scaly 
Cleavage
Perfect, None, None 
Luster
Pearly 
Color
bluish, colorless, violet, greenish, pearl white 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
2-3 

Data courtesy of Webmineral.

Collection
Phillips Collection

All photos by Dakota Matrix and are Copyrighted © and may not be used without permission. Copyright © 2025 - Dakota Matrix Minerals, Inc. Privacy | Terms & Conditions | Site Map