$220Median
2Sold (12 mo)
$65Last sale
Phlogopite specimens for sale
6 for sale · $150–$1,200 USD
59 in the gallery
Phlogopite is a phyllosilicate mineral in the mica group, typically forming in lamellar sheets with perfect basal cleavage and a pearly to vitreous luster. Its color ranges from silvery-brown to brownish-green, and crystals commonly occur as thin flakes or microcrystalline masses that highlight a characteristic platy habit. Specimens often display a silky sheen when light reflects off the smooth, layered surfaces, making them attractive to collectors of sheet minerals and mica varieties.
- Formula
- KMg3(AlSi3O10)(OH)2
- Rarity
- Common
- Stability
- Stable
- Collector interest
- Moderate Interest
- Classification notes
- Silicate; Phyllosilicate; Mica group (Potassium-rich phyllosilicate)
Key characteristics
- Crystal system
- monoclinic
- Mohs hardness
- 2.5–3
- Specific gravity
- 2.78–2.85
- Luster
- vitreous, pearly
- Transparency
- transparent, translucent
- Color
- colorless, white, gray, brown, red, orange, yellow, green
- Streak
- white
- Cleavage
- perfect
- Fracture
- uneven
- Crystal habit
- tabular, prismatic, bladed, granular, massive
Buy Phlogopite specimens
View all 6Where Phlogopite is found
Top localities
- Ladjuar Medam4 specimens
- Mogok Valley4 specimens
- Franklin3 specimens
- Kiran3 specimens
- Sar-e-Sang3 specimens
- Bagdad Mine2 specimens
- Yates Mine2 specimens
- Aliabad1 specimen
- Anosy1 specimen
- Badakhshan1 specimen
About Phlogopite
Notable localities include Afghanistan, Canada, the United States, Myanmar, and Madagascar, where phlogopite accompanies peridotite and ultramafic rocks or forms in pegmatitic environments. In hand specimens, the mineral’s flexible sheets can be peeled or separated, illustrating classic mica behavior and contributing to its appeal for display and study. Collectors value phlogopite for its elegant lamination, subdued color palette, and the way its sheets catch light in mineral cabinets. Its occurrence alongside related micas and ferro-magnesian minerals adds to the intrigue of regional mineral assemblages.
