In 1951, a farmer near the Patagonian town of Esquel set out to dig a hole for a water tank. His shovel struck something that would not move, something dense and dark buried in the soil. He had no way of knowing it, but he had found a piece of a shattered world, a fragment that had drifted through space for billions of years before coming to rest in his field. Cut open and polished, it would reveal a scatter of golden-green crystals suspended in metal, and collectors would one day call it one of the most beautiful meteorites ever found.
The Esquel meteorite is a pallasite, one of the rarest and most striking classes of meteorite in existence. Pallasites are stony-iron meteorites, and when a slab is sliced and polished, light passes through translucent crystals of olivine, the same mineral that, in gem quality, we call peridot, scattered like amber-and-emerald glass within a matrix of nickel-iron. Scientists believe pallasites form at the violent boundary deep inside a planetesimal, where the molten metal core meets the rocky mantle above it. To hold a piece of Esquel, then, is to hold the buried heart of a small world that was smashed apart long before Earth had finished forming. Few objects on the planet offer so direct a view into the interior of another.
For four decades the meteorite stayed local, a curiosity from a hole in the ground. That changed in 1992, when the American meteorite dealer Robert Haag, one of the most famous and colorful figures in the trade, purchased the main mass and carried it to the United States. Almost every polished slice of Esquel now circulating among collectors and museums was cut from that single piece, which means that scattered fragments in display cases around the world were once a single stone buried in a Patagonian field. Sources differ on its weight: the 1964 Meteoritical Bulletin recorded a main mass of roughly 1,500 kilograms, while later accounts place it closer to 680 or 755 kilograms, a discrepancy typical of objects whose early history went undocumented. What is not in dispute is its standing. Among meteorite enthusiasts, Esquel is regarded as one of the most beautiful meteorites ever found and one of the most coveted pallasites in the world.
You do not have to travel to Patagonia to see Esquel. A large, luminous slice of it is displayed in the meteorite hall of the American Museum of Natural History in New York, where careful backlighting sets the olivine crystals glowing like stained glass and stops visitors in their tracks. Other pieces reside in collections such as the Canadian Museum of Nature, and smaller polished slices circulate among private collectors who prize them above almost any other meteorite. Each window captures the same astonishing geometry: the rounded crystals frozen in place exactly as they cooled inside their parent body, untouched by the eons since. Because olivine is the gem we call peridot, a slab of Esquel is in a real sense a sheet of cosmic jewelry, gem-quality mineral that was forged not in Earth's crust but in the depths of another world. It is among the most photographed meteorites on the planet, and standing before one, it is easy to understand why scientists and collectors alike speak of it with something close to reverence.
The journey that ended in a Chubut field is almost unimaginable in scale. The parent body broke apart in the early solar system, billions of years ago. The fragment that became Esquel then wandered the void until Earth's gravity finally caught it and pulled it down through the atmosphere to the dry steppe of northwest Patagonia, where it lay quietly in the ground until a farmer's shovel found it. The town of Esquel, better known as the gateway to Andean lakes and the terminus of an old steam railway, thus carries a second, stranger distinction. It lent its name to a sliver of a long-vanished planet, now scattered in pieces across the museums and collections of the world.
The Esquel meteorite was recovered near Esquel, in northwest Chubut Province, around 42.90°S, 71.33°W, on the dry steppe just east of the Andean lake district. The find site itself is unmarked open country, but the surrounding landscape, the foothills rising west toward the cordillera and the broad Patagonian plains stretching east, is striking from the air. The nearest airport is Esquel (Brigadier Antonio Parodi, ICAO SAVE), only a few kilometers from town. A flight at 6,000 to 9,000 feet over the region shows the sharp transition from green Andean valleys to arid steppe. Skies here, in the rain shadow east of the mountains, are often clear, a contrast to the cloud-bound Pacific slopes to the west.