Ludlamite

Ludlamite specimens for sale

16 for sale · $175–$12,500 USD

59 in the gallery

Ludlamite is a hydrated iron phosphate mineral with the formula Fe2+3(PO4)2·4H2O. It typically forms as soft, vitreous to pearly crystals in phosphate-bearing hydrothermal environments, often presenting a pale green to blue-green color and a translucent to transparent appearance in well-formed specimens. Crystals can show a platy or tabular habit, sometimes forming aggregates or delicate sprays that highlight its subtle luster and mineralogical clarity. Notable specimens have been collected from Bolivia, Mexico, the United States, Brazil, and the United Kingdom, where secondary mineral localities and detailed crystallization histories contribute to its identification and appeal.

Formula
Fe2+3(PO4)2 · 4H2O
Rarity
Rare
Stability
Moderately Stable
Collector interest
Moderate Interest
Classification notes
Phosphate; hydrated iron phosphate, ludlamite group

Key characteristics

Crystal system
monoclinic
Mohs hardness
3.5
Specific gravity
3.12–3.19
Luster
vitreous, pearly
Transparency
transparent, translucent
Color
green, yellow
Streak
white, green
Cleavage
perfect
Fracture
uneven
Crystal habit
prismatic, tabular, granular, massive

Buy Ludlamite specimens

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Where Ludlamite is found

Top localities

  1. Blackbird mine10 specimens
  2. Blackbird Mine8 specimens
  3. West Camp8 specimens
  4. Huanuni mine7 specimens
  5. Santa Eulalia Mining District6 specimens
  6. San Antonio Mine3 specimens
  7. Wheal Jane3 specimens
  8. Brazil1 specimen
  9. Cabeza do Cachorro Mine, São Gabriel da Cachoeir1 specimen

About Ludlamite

Collectors value ludlamite for its crisp color, high hydration, and the way it displays in hand sample or cabinet settings. While often found in association with other phosphate minerals, its hydration state and glassy shine make it a distinctive presence in a display case, especially when paired with complementary minerals that illuminate its pale green tones. The mineral’s relative rarity and the finesse of its crystal forms add a layer of interest for micromounts and larger display pieces alike, inviting careful handling to preserve its delicate hydration and clarity.