Kesterite specimens for sale

7 for sale · $300–$12,500 USD

18 in the gallery

Kesterite is a copper zinc tin sulfide mineral with the formula Cu2ZnSnS4. It forms in the tetragonal system and often occurs as prismatic to tabular crystals with a resinous to adamantine lustre and a pale to dark yellowish-brown color. Crystals may display well-formed faces and can form in granular, massive, or occasionally euhedral habits, reflecting its sulfide mineral group characteristics.

Formula
Cu2ZnSnS4
Rarity
Rare
Stability
Stable
Collector interest
Moderate Interest
Classification notes
Sulfide; stannite group, Strunz 2.CB.15a

Key characteristics

Crystal system
tetragonal
Mohs hardness
4.5
Specific gravity
4.54–4.59
Luster
metallic
Transparency
opaque
Color
gray, black, brown
Streak
black
Cleavage
none
Fracture
uneven
Crystal habit
granular, massive

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Where Kesterite is found

Top localities

  1. Pingwu Co.4 specimens
  2. China1 specimen
  3. Pingwu beryl mine1 specimen

About Kesterite

Notable specimens have been reported from China, where high-quality crystals and compact aggregates are found in hydrothermal and skarn-related environments. Collectors value kesterite for its crystallographic forms and the way its metallic luster interacts with light, producing subtle color shifts that enhance its presence in a cabinet of sulfides. While it can be associated with other copper- and zinc-bearing sulfide minerals, kesterite’s distinctive composition and crystal habits often make it a memorable addition to a collection, especially for those focused on copper, zinc, tin sulfides and related paragenesis.