Natural Pyrite Crystal in Host Rock Matrix (Fool's Gold)
Raw Mineral Specimen - Iron Sulfide (FeS2) · None (Brass-yellow metallic mineral). Unlike gold, it is brittle and leaves a greenish-black streak when rubbed on ceramic.
Purity: Contains 0% Gold; this is Iron Sulfide. It has no Karat rating as it is a base metal mineral, not a precious metal.
Type
Raw Mineral Specimen - Iron Sulfide (FeS2)
Purity
Contains 0% Gold; this is Iron Sulfide. It has no Karat rating as it is a base metal mineral, not a precious metal.
Gold Type
None (Brass-yellow metallic mineral). Unlike gold, it is brittle and leaves a greenish-black streak when rubbed on ceramic.
Weight
25-50 grams total specimen weight. Pyrite is significantly lighter than real gold (Density: 5.0 vs Gold: 19.3).
Description
A classic 'Fool\'s Gold' specimen featuring sharp, metallic pyrite crystals embedded within a grey and white host rock matrix. The crystals exhibit the characteristic cubic or dodecahedron geometry that distinguishes pyrite from native gold nuggets, which are usually rounded or irregular. While visually striking due to its intense metallic shimmer, it lacks the malleability and density of true gold.
Key Features
Angular cubic crystal structure, greenish-black streak potential, brittle fracture, and Pale-Yellow brassy hue.
Color & Finish
Pale brassy-yellow with a metallic luster. Surface displays natural crystal faces rather than a polished or worked finish.
Hallmarks & Stamps
None. As a raw geological specimen, it lacks any purity or maker markings used in the precious metals industry.
Dimensions Estimate
Length: 3-4 cm; Width: 2-3 cm. Specimen size is consistent with a small 'hand sample' geological collector piece.
Gemstones & Inlays
Natural cubic/pyritohedral crystal growth. No added gemstones; the mica and quartz-like host rock provides the setting.
Clasp & Closure
Not applicable; raw mineral specimen.
Chain & Links
Not applicable; raw mineral specimen.
Craftsmanship Details
Natural crystalline formation. Sharp edges and distinct geometric planes are a result of the internal atomic lattice of Iron and Sulfur.
Authentication Indicators
Red flags for gold: Crystal geometry (gold doesn't form cubes naturally like this), visible host rock attachment, and brassy (rather than buttery) color.
Origin & Maker
Natural origin (Mother Earth). Common sources include Peru, Spain, Italy, or US (Colorado/Arizona/Pennsylvania).
Era & Period
Modern Geological Sample. Pyrite forms over millions of years through hydrothermal or sedimentary geological processes.
Age Estimate
Geological age likely millions of years; recently collected or mined for mineral enthusiasts.
Cultural Significance
Historically used in wheel-lock firearms to create sparks and used by ancient Incas as mirrors. It symbolizes abundance and protection in many crystal healing cultures.
Condition Notes
Fair to Good. Common for pyrite to exhibit 'tarnish' or oxidation over time if exposed to high humidity. Host rock appears stable.
Value Estimate
$5 - $15 USD. Value is based on aesthetic appeal as a mineral specimen rather than metal weight; it has zero gold melt value.
Care & Maintenance
Keep in a dry environment to prevent 'pyrite disease' (decomposition). Clean with a dry brush; avoid water which can accelerate oxidation.
Similar Items
Native Gold Nuggets (heavier, softer), Chalcopyrite (more colorful/iridescent), and Mica (flakey, non-metallic).
Interesting Facts
The name Pyrite comes from the Greek 'pyr' meaning fire, because it generates sparks when struck by steel. It has fooled miners for centuries, earning its moniker 'Fool\'s Gold'.