Is a Meteorite Worth Money? How to Value and Sell It

Finding an unusual rock might spark curiosity about its origin and potential value. While many terrestrial rocks can mimic a meteorite, genuine space rocks possess distinct characteristics. This guide explores how to identify a potential meteorite, assess its worth, and navigate the selling process.

Identifying Potential Meteorites

Identifying a potential meteorite begins with observing its physical characteristics, which often differ from common Earth rocks. A telling sign is the presence of a fusion crust, a thin, dark, glassy coating formed as the meteorite’s outer surface melts during its fiery passage through the atmosphere. This crust may appear black and shiny when fresh, gradually becoming rusty brown over time.

Many meteorites also exhibit regmaglypts, which are thumbprint-like indentations or pits on their surface. These depressions are created by the ablation of material as the meteorite descends through the atmosphere. While irregular shapes with rounded edges are common, meteorites rarely have large holes or gas bubbles, unlike volcanic Earth rocks or industrial slag.

A simple magnet test can provide a strong indication, as most meteorites contain metallic iron and nickel, making them attracted to a magnet. Even many stony meteorites, primarily composed of silicates, will show some magnetic attraction due to scattered metallic flecks. However, some Earth rocks, like magnetite, are also magnetic, so this test is not definitive.

Density is another indicator, as meteorites are generally heavier for their size than typical Earth rocks due to their metallic content. Iron and stony-iron meteorites are particularly dense, while some stony meteorites might feel only slightly heavier. A crucial non-destructive test involves checking for a streak; if a suspected meteorite leaves a black or reddish-brown streak when rubbed on unglazed ceramic, it likely contains common Earth minerals like magnetite or hematite and is not a meteorite.

Internally, if a suspected stony meteorite is broken or cut, tiny, shiny metal flakes or small, spherical structures called chondrules might be visible. Chondrules are solidified droplets of melted rock characteristic of the most common type of meteorite, chondrites, and are not found in terrestrial rocks. These internal features, combined with external signs, help distinguish a true meteorite from a “meteor-wrong.”

Factors Determining a Meteorite’s Value

Once tentatively identified as a meteorite, its potential monetary value depends on several factors, with rarity being a primary driver. Meteorites are broadly categorized into three main types: stony, iron, and stony-iron, each with various sub-classifications. Stony meteorites, particularly ordinary chondrites, are the most common and generally command lower prices, often ranging from $0.50 to $5 per gram.

In contrast, rarer types, such as lunar and Martian meteorites, are significantly more valuable, sometimes selling for $1,000 per gram or more due to scarcity and unique origins. Pallasites, a type of stony-iron meteorite known for their embedded olivine crystals, are also highly sought after for aesthetic appeal, with prices ranging from $50 to $500 per gram depending on quality. The overall mass and size of a specimen also influence its value, with larger pieces typically being more desirable.

The condition and completeness of a meteorite play a significant role in its valuation. Well-preserved specimens with an intact fusion crust, minimal weathering, and no significant damage are more valuable. Scientific significance further enhances worth; meteorites that offer new insights into the solar system’s formation, contain unusual minerals, or are from a “witnessed fall” often command higher prices from collectors and institutions.

Provenance and clear documentation are also important for establishing market value. A meteorite with a verifiable chain of custody and classification records from a recognized institution adds credibility and assurance of its authenticity. Professional classification confirms the meteorite’s identity, type, and scientific properties. This process involves detailed analysis of its mineralogy, chemistry, and isotopic composition, often requiring a small sample.

To obtain a professional assessment, individuals typically contact universities with meteorite collections, natural history museums, or established meteorite dealers and experts. This expert classification is essential for both scientific purposes and establishing market value, as unclassified specimens have significantly less worth. The process may involve microscopic examination of thin sections, chemical analysis, and sometimes isotopic studies to determine origin and type.

Selling a Meteorite

Once a meteorite has been identified and its value assessed, several avenues exist for selling the specimen. One common option is to approach reputable meteorite dealers. These specialists possess extensive market knowledge, can accurately appraise the meteorite, and have established networks of collectors and institutions. Dealers often offer fair prices and ensure authenticity and provenance for potential buyers.

Another viable option is to utilize specialized online auction sites or marketplaces dedicated to natural history items or meteorites. These platforms provide a broad reach to a global community of collectors. When using online marketplaces, providing high-quality photographs, detailed and accurate descriptions, and documentation of the meteorite’s classification is essential to attract serious buyers. Some general online marketplaces also allow meteorite sales, but research their policies.

Direct sales to private collectors can also occur, particularly within the meteorite community. This might involve networking through meteorite shows, forums, or collector groups. Building trust and demonstrating authenticity are paramount in these direct transactions. For exceptionally rare or scientifically significant meteorites, major auction houses specializing in natural history or rare collectibles might be an option for high-value sales.

Before selling, it is important to understand the legal and ethical considerations surrounding meteorite ownership. In the United States, if a meteorite is found on private land, it generally belongs to the landowner. However, if found on federal property, such as national parks or lands managed by the Bureau of Land Management, specific regulations apply, and the meteorite typically belongs to the government. Be aware of ownership laws specific to the find’s location.

Ethical practices within the meteorite community emphasize honest representation, ensuring the meteorite’s authenticity, and maintaining accurate records of its discovery and classification. Responsible sellers provide clear provenance, detailing the meteorite’s history from its finding to its current ownership. For shipping valuable specimens, careful packaging is necessary to prevent damage, often involving secure, cushioned containers and insured shipping services.