$155Median
4Sold (12 mo)
$250Last sale
Polylithionite specimens for sale
3 for sale · $250–$850 USD
20 in the gallery
Polylithionite is a mica-group mineral that forms in potassium-rich, aluminous pegmatites and granitic environments. It typically appears as small, well-formed crystals or microcrystalline masses with a vitreous to pearly luster. The mineral’s color can range from colorless to pale yellow, and it often occurs in foliated or layered habit consistent with other micas. Specimens are prized when associated with their alkali-rich mineral assemblages, and are frequently found in zoned crystals that reveal subtle internal color zoning under reflected light.
- Formula
- KLi2Al(Si4O10)(F,OH)2
- Rarity
- Rare
- Stability
- Stable
- Collector interest
- Very High Interest
- Classification notes
- Phyllosilicate, mica group
Key characteristics
- Crystal system
- monoclinic
- Mohs hardness
- 2.5–3
- Specific gravity
- 2.8–2.9
- Luster
- vitreous, pearly
- Transparency
- transparent, translucent
- Color
- colorless, white, gray, pink, yellow
- Streak
- white
- Cleavage
- perfect
- Fracture
- uneven
- Crystal habit
- tabular, prismatic, massive
Buy Polylithionite specimens
View all 3Where Polylithionite is found
Top localities
- Mont Saint-Hilaire8 specimens
- Poudrette Quarry5 specimens
- Carrière Poudrette2 specimens
- Québec1 specimen
About Polylithionite
Notable localities include Canada and Brazil, where cracking or hydrothermal alteration in pegmatites can produce clear or lightly tinted polycrystalline aggregates. In polished sections, polylithionite can exhibit a soft, translucent appearance that rewards careful brushing and illumination. Collectors value it for its rarity and the scientific interest of its fluorine-rich composition, alongside its affiliation with other alkali-rich mineral groups. While modest in size, well-prepared crystals can serve as distinctive specimens within a mineral cabinet, especially when paired with complementary minerals from pegmatitic zones.
