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On Friday, April 3, 2026, Artemis Fine Arts in Louisville, Colorado, will host a premier live auction specializing in Native American, Ethnographic, and Ancient Art. The sale features a vast range of legally acquired artifacts, including Northwest Coast and Pre-Columbian tribal works, Oceanic and Spanish Colonial art, and an extensive selection of Egyptian, Greek, and Roman antiquities. From ancient fossils to Near Eastern and Asian visual arts, the auction offers collectors a rare opportunity to acquire pieces of global cultural heritage, with live bidding set to begin at 8:00 AM GMT-6. In this image: Iron-Nickel Meteorite 40.2 lb with Regmaglypts. Estimate: $12,000 - $18,000.

Late Cretaceous Fossil Egg Clutch Attributed to Troodon. North America or Siberia, Late Cretaceous period, ca. 77.5 to 76.5 million years ago. A clutch of eleven Troodon eggs, beautifully preserved in their reddish-brown matrix. The name Troodon refers to several species of bird-like dinosaurs found mainly in the northern Rocky Mountains, with a few specimens known from northern Alaska, Siberia, and the western Russia/China border. The eggs are elongated, with a grey-blue color and obvious shell structure underneath a thin layer of red-brown deposits. Estimate: $8,000 - $12,000.

12th C. Medieval Stone Corbel with Dual Faces. Europe, Medieval period, ca. 12th to 14th century CE. A compact block of carved stone animated by two opposing faces, this medieval European corbel blurs the boundary between architecture and imagination. One head presents a human visage with softened, eroded features, while the other is marked by pointed, feline-like ears, suggestive of a zoomorph or demon. Estimate: $6,000 - $9,000.

Holy Roman Empire Bronze Seal - Baldwin of Luxembourg. Western Europe, Holy Roman Empire, Medieval period, ca. 14th century CE. A powerful survival of medieval authority, this bronze seal matrix of Baldwin of Luxembourg (1285-1354), Archbishop and Elector of Trier, is accompanied by a red wax impression preserving the same commanding imagery in vivid relief. Estimate: $9,000 - $13,500.

Steppe Bison (Bison priscus) Partial Skull, Horn Cores. North America, Northwestern United States, Alaska, Pleistocene, ca. 250,000 to 10,000 years ago. This is an amazing find, a partial skull with massive horns and sheaths from a prehistoric steppe bison, Bison priscus. The bone coloration throughout is a lustrous caramel brown that is stunning, and the cavity on the brow reveals an inner spiderweb of bone structures. The most notable part are the horn cores, still covered with the sheaths. Estimate: $5,000 - $7,500.

15th C. English Medieval Gold Ring - Arm & Sword Crest. Northern Europe, England, Late Medieval period, ca. 15th century CE. A richly expressive gold signet ring whose modest scale carries the weight of identity, trust, and authority, this 15th century English example presents an octagonal bezel engraved with a bold heraldic device. At its center appears the arm and sword crest - an armored arm embowed, grasping a sword upright - cut with confident, economical lines well suited to repeated sealing. Estimate: $5,000 - $7,500.

Rare Mammoth Tusk Fossil Blue & Green Vivianite Colors. North America, Northwestern United States, Alaska, Pleistocene epoch (Ice Age), ca. 35,000 to 10,000 years ago. This is a stunning fossilized tusk from a woolly mammoth with incredible coloration! This fragment has a curved profile with a polished and lustrous surface. The tusk base is jagged with a concave interior root area, showing the interior structures and layers. Estimate: $4,000 - $6,000.

Ornithomimid Dinosaur Claw, Cretaceous Period. North America, Cretaceous period, approximately 75 million years ago. A fossilized claw from an Ornithomimus dinosaur, a feathered, winged dinosaur said to have resembled an ostrich recovered from the Cretaceous deposits of North America, that has provided new insights into dinosaur plumage as well as the origin of the avian wing. Estimate: $3,000 - $4,000.

Early Mexican Spanish Colonial Marquetry Box, Silver Milagro Pulls. Mexican, Spanish Colonial era, ca. 18th to 19th century CE. A lovely marquetry storage box constructed with ebony and mahogany veneers, inlaid with contrasting honey-toned hardwood, elephant ivory, and engraved silver panels. The geometric veneer arrangement frames the top and sides, while the silver drawer fronts display abstract scrolling and stippled motifs. Estimate: $3,600 - $5,400.

Large Knightia Fish Fossils 'Mass Mortality' Stone Slab. North America, United States, Wyoming, Green River Formation, Eocene Epoch, ca. 53.5 to 48.5 million years ago. A large limestone slab preserving a dense concentration of Knightia fish fossils, representing what is known as either a life assemblage or a mass mortality event. Such groupings occur when a school of fish died suddenly - often from events such as oxygen depletion or rapid environmental change - and were quickly buried in fine sediment. Estimate: $3,500 - $5,500.