Double-Terminated Mangano Calcite with Pyrite UV – Huanzala Mine, Peru – 15 Grams

A striking Double-Terminated Mangano Calcite with Pyrite specimen from the renowned Huanzala Mine in Ancash, Peru. Despite its compact size, the specimen offers exceptional visual impact through the contrast of a substantial translucent calcite crystal, bright metallic pyrite, sparkling pale matrix, and vivid ultraviolet fluorescence.

The primary calcite crystal displays a blocky, elongated form with naturally developed termination faces visible at both ends. Under ordinary lighting, it appears colorless to softly cream with translucent areas, internal growth structures, subtle zoning, and naturally textured crystal faces.

Several sharply defined pyrite crystals emerge from the surrounding matrix and occur against the calcite itself. Their bright brassy-gold metallic luster creates dramatic contrast against the pale calcite and finely crystallized matrix. Smaller metallic crystals are visible from several viewing angles, making the reverse nearly as interesting as the primary display face.

Under ultraviolet illumination, the manganese-bearing calcite transforms into an intense fluorescent coral-pink to red-orange. The crystal’s internal zoning and termination geometry become especially visible under UV, while the pyrite remains dark and metallic against the glowing calcite. Fluorescence can vary according to the wavelength, strength, and color balance of the UV lamp used.

The Huanzala Mine is internationally recognized for highly collectible pyrite, fluorite, calcite, sphalerite, and complex mineral associations. Manganese-bearing calcite from Peru is documented for its strong pink fluorescence, making this specimen an attractive combination of classic locality material and dramatic UV response.

Measuring approximately 1 × 1 × 0.5 inches and weighing 15 grams, this mounted thumbnail specimen combines strong crystallography, vivid fluorescence, metallic contrast, and prestigious locality provenance in a highly displayable format.

Specifications

Minerals: Manganese-Bearing Calcite with Pyrite

Trade Name: Mangano Calcite with Pyrite

Locality: Huanzala Mine, Huanzala, Huallanca District, Bolognesi Province, Ancash, Peru

Weight: 15 grams

Dimensions: Approximately 1 × 1 × 0.5 inches

Primary Formation: Blocky calcite crystal with termination faces developed at both ends

Color Under White Light: Colorless, translucent white, pale cream, and metallic brassy gold

Fluorescence: Intense coral-pink to red-orange under ultraviolet illumination

UV Disclosure: Fluorescent color and intensity may vary with UV wavelength, lamp strength, ambient lighting, and camera settings

Associated Mineral: Bright metallic pyrite crystals

Matrix: Pale finely crystallized natural matrix; exact matrix minerals have not been analytically confirmed

Luster: Vitreous calcite with metallic pyrite

Transparency: Transparent to translucent calcite with opaque pyrite

Calcite Crystal System: Trigonal

Calcite Chemical Formula: CaCO₃ with manganese-bearing composition

Mounting: Affixed to a custom display base produced in-house

Condition: Natural mineral specimen with inherent contacts, inclusions, growth textures, internal cleavage features, surface irregularities, and matrix attachments

Exact specimen shown

About Mangano Calcite and Pyrite

“Mangano calcite” is the popular collector and trade name for manganese-bearing calcite. Manganese substitutes for a portion of the calcium within the calcite structure and may produce pale pink coloration, strong fluorescence, or both. A specimen can appear nearly colorless under ordinary lighting yet glow intensely pink or red-orange under ultraviolet light.

Calcite is a calcium carbonate mineral known for its wide variety of crystal habits, perfect cleavage, and sensitivity to acids. The developed faces at both ends give this crystal its distinctive double-terminated presentation.

Pyrite is an iron sulfide mineral recognized by its brassy-gold metallic appearance. Its reflective crystals provide a strong visual contrast against the pale matrix and brilliantly fluorescent calcite.

The Huanzala Mine is one of Peru’s most celebrated collector-mineral localities and is particularly respected for lustrous pyrite and complex combinations of calcite, fluorite, sphalerite, quartz, and other associated minerals.

Collector Notes

This specimen features:

• Double-terminated manganese-bearing calcite
• Intense coral-pink to red-orange UV fluorescence
• Translucent calcite with visible internal structure
• Attractive blocky crystal geometry
• Multiple bright metallic pyrite crystals
• Sparkling pale crystalline matrix
• Dramatic contrast under both white light and UV
• Multiple attractive viewing angles
• Authentic Huanzala Mine locality
• Compact mounted presentation
• Custom display base produced in-house
• Exact specimen pictured

Perfect for collectors of fluorescent minerals, mangano calcite, Peruvian pyrite, Huanzala Mine specimens, mounted thumbnails, manganese-bearing minerals, calcite crystals, and contrasting mineral associations.

Professionally packaged and shipped from Colorado.

You will receive the exact specimen shown.

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