Pallasite peridot is gem-quality olivine that has been extracted from pallasite meteorites — a rare class of stony-iron meteorites in which olivine crystals are embedded in a matrix of nickel-iron metal — and faceted as a collector gem with confirmed extraterrestrial provenance. The combination of meteoric origin, the same fundamental mineralogy as terrestrial peridot, and the small but documented supply of facetable material has established pallasite peridot as a recognisable niche in the rare-gem collector market. Notable pallasite sources for facet-grade material include the Esquel meteorite found in Argentina, the Seymchan meteorite from far-eastern Russia, the Brahin meteorite from Belarus, the Brenham meteorite from Kansas, and the Imilac meteorite from the Atacama Desert of Chile.

What pallasites are

Pallasites are a class of stony-iron meteorites characterised by olivine crystals embedded in a matrix of nickel-iron alloy, in proportions that vary among individual specimens but typically run from approximately 30 to 60 per cent olivine by volume. The class was named for the German naturalist Peter Simon Pallas, who in 1772 described what is now called the Krasnojarsk pallasite, a Russian specimen that helped establish the meteoritic origin of fallen stones as a recognised scientific category.

The current scientific consensus on pallasite formation places these meteorites at the boundary between the silicate mantle and metallic core of differentiated asteroids — the small planetary bodies that formed in the early solar system and underwent partial melting and differentiation, separating denser metallic material from less-dense silicate material. The boundary zone between the two phases is where olivine crystals could grow embedded in the nickel-iron, and the catastrophic disruption of the parent asteroid through subsequent collision is what released pallasite material into the meteoroid population that eventually delivered the specimens to Earth.

Composition and properties

Pallasite olivine has the same fundamental composition as terrestrial peridot — a magnesium-iron silicate of the forsterite-fayalite series, with the gem-quality material concentrated near the magnesium-rich forsterite end. The optical properties are essentially identical to terrestrial peridot: hardness of 6.5 to 7 on the Mohs scale, specific gravity around 3.32 to 3.37, refractive indices of approximately 1.654 to 1.690, and the characteristic yellowish-green to medium-green colour. Internal inclusions, growth structures, and other gemmological features are consistent with terrestrial peridot, since the material is in its essential nature the same mineral.

The distinguishing feature of pallasite peridot is provenance — the extraterrestrial origin confirmed through nickel-iron metal still attached to or embedded with the olivine, through trace-element chemistry that may reflect the parent body's composition, and through the documentary chain of custody linking the cut stone to a specific meteorite fall or find. Crystals are typically small, fractured, and often brownish-tinted from shock metamorphism and from iron staining acquired during the meteorite's terrestrial residence.

Sourcing and cutting

Pallasite peridot reaches the gem trade through a small number of meteorite dealers and through specialist cutters who work with pallasite material. The cutting process is challenging: the olivine crystals in pallasite meteorites have typically been subjected to severe shock during the asteroid disruption and subsequent terrestrial impact, leaving them fractured, partially altered, and often unsuitable for facet work. Cutters select the rare clean, unshocked crystals from the available material, and the cut yield from any given meteorite specimen is typically very small relative to the total olivine content.

Faceted pallasite peridot is generally small, with most cut stones below one carat and few examples exceeding two carats. The colour is typically pale yellowish-green to medium green, often with a slight brownish cast from shock or iron staining. Clean material is rare, and most cut stones show some level of inclusions or surface character. Cutting is performed by specialists familiar with the requirements of the material, with the production typically allocated directly to collector dealers rather than entering general commercial channels.

Notable sources

The Esquel pallasite, found in 1951 in Chubut Province, Argentina, has produced some of the finest faceted pallasite peridot, with cut stones from the Esquel olivine in the trade since the 1990s. The Seymchan pallasite, from far-eastern Russia and originally found in 1967, has yielded substantial quantities of cut material, particularly since the 2004 follow-up find that recovered additional masses. The Brahin pallasite of Belarus, the Brenham pallasite from Kansas, the Imilac pallasite of Chile, and the Fukang pallasite of China — discovered in 2000 and one of the largest pallasite specimens known — have all yielded facetable olivine for the collector market.

Each meteorite source produces material with subtle differences in colour and inclusion character, and serious collectors may seek to assemble suites of pallasite peridot from multiple sources for comparative interest. Documentation of the specific meteorite source is the central provenance element for cut pallasite peridot, supporting both authenticity verification and the collector value of the material.

Identification and verification

Distinguishing pallasite peridot from terrestrial peridot is, in mineralogical terms, essentially impossible at the cut-stone level — the two are the same mineral with the same optical properties. Provenance therefore rests on documentation: chain-of-custody records linking the cut stone to a specific meteorite specimen, sometimes accompanied by photographs of the rough material before cutting, and ideally with elemental or isotopic analysis confirming the meteoritic chemistry where the necessary instrumentation is available.

Some pallasite peridot pieces in the trade are mounted with adjacent fragments of nickel-iron matrix, providing visible documentary evidence of the meteoritic origin. Others are cut as unmounted faceted stones with provenance documentation alone. Buyers should specify the level of provenance documentation they require and verify the chain of custody before completing high-value purchases.

Market position

Pallasite peridot occupies a small but established niche in the rare-gem and meteorite-collector markets. Pricing reflects both the standard quality factors for peridot — colour, clarity, cut, size — and the meteoritic provenance, which adds a substantial premium over terrestrial peridot of comparable quality. Cut pallasite peridot in the half-carat to one-carat range typically trades at four-figure prices for the better-quality material, with exceptional clean stones commanding higher pricing. The market is thin, transactions are infrequent, and price discovery depends largely on dealer-to-collector private sales.

For dealers and collectors interested in extraterrestrial gemstones, pallasite peridot is one of the principal accessible categories, alongside meteoritic moldavite (a tektite produced by terrestrial impact rather than a true meteorite gem) and occasional faceted material from other meteorite types. The combination of meteoritic origin and the same mineral identity as a familiar terrestrial gem species supports continuing collector demand.

Care

Pallasite peridot follows the same care guidelines as terrestrial peridot. Hardness of 6.5 to 7 places the material below the threshold for routine ring wear, and pendants and earrings are the more practical setting choices. Cleavage in two directions and heat sensitivity require conservative tool selection during setting and resizing. Cleaning should be by mild soap and warm water; ultrasonic and steam cleaning should be avoided particularly given that pallasite material may have shock-induced micro-fractures that ultrasonic vibration could propagate.

Further reading

• GIA Gems & Gemology — pallasite peridot articles
• ICA — meteoritic gem reference
• International Gem Society — pallasite and meteoritic peridot