Franckeite - image 1
Franckeite - image 2
specimen video

Franckeite

$3,000.00

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Crystal Classics
Crystal ClassicsFeatured
Tucson, Arizona, USA
7,543 for sale·132 sold
A very rich miniature specimen consisting of aggregates of bladed Franckeite crystals, a rare iron-lead-tin-antimony sulfosalt. The San José mine, Bolivia, has produced some of the world's best crystallized specimens and this specimen is no exception. Specimens from this mine are never large, but then neither are crystals of this rare species. Excellent crystals of metallic grey to silvery grey Franckeite form intergrown radial platy crystal aggregates covering all sides of the specimen. A very fine Franckeite specimen displaying the typical crystal form very well.

Product details

Species
FranckeiteAbout Franckeite →
SizeMiniature
Dimensions4.0 x 2.9 x 2.4 cm
Listed on12/02/2024
Locality
Bolivia, Potosí, San Jose MineRegional guide →
SKUCC27609

Learn more

Mineral guide
Learn about Franckeite
, a rare micaceous lead-tin-antimony sulfosalt, forms layered rosettes and curved plates; Bolivian origin and texture make it collectible.
Franckeite
Regional guide
Franckeite from San José Mine, Bolivia
from the San José Mine is one of the classic Bolivian sulfosalt specimens: black to steel-gray, metallic, soft, heavy, and often built from curving blades and radiating rosettes rather than simple textbook crystals. The best pieces have a lively sheen that moves across the bent plates as the specimen is turned, giving an otherwise dark mineral a surprisingly sculptural presence. Collectors prize San José franckeite because it shows the species in displayable form—not merely as a massive ore constituent, but as rosettes, foliated aggregates, compact sprays, and curved, bladed crystals that express the mineral’s layered structure in the hand.