Ankerite with Dolomite, Sphalerite, and Pyrite

Sourced From

USA - Eagle Mine, Gilman, Colorado - 88-88A Stope, 24 Level

Full item description
Natural ankerite specimen from the Eagle Mine in Gilman, Eagle County, Colorado, from the 88-88A Stope on the 24 Level. This piece combines carbonate matrix (ankerite with dolomite) with metallic sulfides (sphalerite and pyrite), giving strong contrast in one classic locality specimen. Expect warm carbonate tones, darker sphalerite presence, and brassy pyrite sparkle. It displays well flat in a cabinet or propped on a small stand to show the mix of texture and luster.

Composition details
Minerals: Ankerite with Dolomite, Sphalerite, Pyrite
Ankerite (carbonate): Ca(Fe,Mg,Mn)(CO3)2
Dolomite (carbonate): CaMg(CO3)2
Sphalerite (zinc sulfide): ZnS
Pyrite (iron sulfide): FeS2
Crystal systems: Ankerite and dolomite are trigonal, sphalerite and pyrite are cubic
Mohs hardness (approx.): ankerite 3.5 to 4, dolomite 3.5 to 4, sphalerite 3.5 to 4, pyrite 6 to 6.5

Metaphysical properties

Chakra: Root

Birthstone month: Not a traditional birthstone

Zodiac sign: Capricorn

Often associated with grounding and steadiness

Commonly linked with focus and staying present

Many collectors associate pyrite with confidence and resolve

Care tips
Handle over a soft surface, metallic edges can be sharp
Avoid soaking and harsh cleaners
Use a soft, dry brush to dust, then store dry
Keep away from high humidity to help pyrite stay clean-looking