Iridescent Chalcopyrite Value Guide

Rainbow Iridescent Goethite Specimen: Galena and Quartz ... — Iridescent Chalcopyrite

Estimated Value

$25 – $40

Period: Naturally occurring formation, collected as a specimen in the 20th-21st century
Origin: Worldwide, commonly found in Chile, Peru, and the United States
Materials: Chalcopyrite
Category: Chalcopyrite

Iridescent Chalcopyrite, famously known as Peacock Ore, is a highly sought-after mineral specimen prized for its vivid, multi-colored tarnish. This copper iron sulfide becomes a collector's favorite when its surface oxidizes to create a stunning spectrum of blues, purples, and golds.

What Is Iridescent Chalcopyrite Worth?

The typical price range for Iridescent Chalcopyrite is $25 - $40 based on recent sales. However, values can vary depending on the item's condition, rarity, and other factors such as:

Intensity and variety of the iridescent colors, with deep blues and purples often commanding higher interest.
The overall size and weight of the specimen, particularly those sourced from notable mines in Chile, Peru, or the USA.
The presence of well-defined crystal faces rather than a simple massive or broken formation.
The condition of the oxide layer, as specimens with minimal scuffing or wear to the iridescent coating are more valuable.

How to Identify Iridescent Chalcopyrite?

Look for a metallic luster with a distinct iridescent oxide layer that mimics the colors of a peacock feather.
Check the base mineral color; beneath the tarnish, authentic chalcopyrite should exhibit a brassy, golden-yellow hue.
Verify the weight, as chalcopyrite is notably denser and heavier than similar-looking minerals like pyrite.
Examine the crystal structure, which typically forms in tetragonal shapes or massive, irregular clusters.

History of Iridescent Chalcopyrite

Chalcopyrite, a copper iron sulfide mineral, has been mined for centuries as a primary source of copper. Its beautiful iridescent tarnish, often referred to as 'peacock ore', occurs naturally when exposed to air and moisture, forming a thin oxide layer that diffracts light into a spectrum of colors. While chalcopyrite itself is ancient, its appreciation as a decorative mineral specimen, particularly for its vibrant colors, surged in recent centuries, making it a popular item for collectors and those interested in geology.