Bone Tools: Their History, Types, and Creation

Bone tools represent one of the oldest and longest-running material traditions in human prehistory, stretching back nearly two million years in southern Africa and persisting in various forms into recent centuries across every inhabited continent. The earliest examples were little more than animal limb fragments pressed into service for digging, while later traditions produced exquisitely shaped needles, fish hooks, hide-working implements, and even musical instruments. What makes bone tools fascinating is not just their age but their diversity, and the fact that multiple hominin species independently figured out how to exploit the mechanical properties of bone for tasks that stone alone could not handle well.

The Oldest Bone Tools on Record

The story of bone tools begins in South Africa’s limestone caves. At the sites of Swartkrans and Sterkfontein, researchers identified modified bone fragments dating to roughly 1.8 to 1.0 million years ago. Early interpretations suggested these tools were used by early hominins to dig up tubers, but microscopic and macroscopic analysis of wear patterns later pointed to a different purpose: digging into termite mounds. The wear signatures on the ancient bones matched those on experimental tools used to probe termite nests, not those used to break through soil for root vegetables. This finding pushed back the evidence for insect-eating as a deliberate dietary strategy and showed that a bone-tool material culture persisted over a remarkably long span in southern Africa.¹

The same tradition turns up at Drimolen, another South African cave site dated to roughly 1.5 to 2 million years ago. An analysis of 22 possible bone tools from Drimolen compared them against bones altered by non-human agents such as carnivore gnawing and natural abrasion. Fourteen of the Drimolen pieces bore a wear pattern indistinguishable from the previously described tools at Swartkrans and Sterkfontein, suggesting the same or a closely related digging task.² Some of the Swartkrans tools even show evidence of deliberate shaping: horncores and an ulna fragment used in digging bear ground facets covered in parallel striations consistent with intentional resharpening. If confirmed, this means early hominins were not simply grabbing whatever bone was at hand but actively maintaining and improving their tools for efficiency.³

Neandertals and Specialized Bone Technology

For a long time, the production of specialized bone tools was considered a hallmark of modern humans. That assumption took a hit when researchers identified lissoirs, smooth-edged bone implements used in hide working, at two Neandertal sites in southwestern France. These tools predate the period when modern humans replaced Neandertals in Europe, ruling out the possibility that Neandertals simply copied the idea from incoming Homo sapiens. Microwear on one of the lissoirs matched the damage patterns seen on similar tools used historically to make hides supple, lustrous, and water-resistant.⁴

Protein analysis of the lissoirs from Abri Peyrony, one of those French sites, added another layer. Using a technique called zooarchaeology by mass spectrometry (ZooMS), which identifies species from collagen fragments, researchers determined that all the lissoirs at Abri Peyrony were made from ribs of large bovids, either bison or aurochs. That consistency suggests the Neandertals were not just grabbing any available bone fragment but selecting specific raw material for the job, a sign of planning and knowledge about which animal bones performed best for hide work.⁵

Types of Bone Tools and What They Did

The sheer variety of bone tool forms across prehistory is striking. Rather than one all-purpose instrument, bone was shaped into specialized implements tailored to particular tasks. Here are the major functional categories that recur across sites and time periods:

• Pointed tools: Awls and punches for piercing hides, basketry, and soft materials. In the Late Neolithic Vinča culture of southeastern Europe, pointed bone tools were among the most common artifact class, manufactured primarily from the metapodial bones of sheep and goats.⁶
• Knapping tools: Bone hammers and retouchers used in stone tool production. At Gough’s Cave in Somerset, England, Magdalenian-era toolmakers used metapodial bones as percussors for heavy blows to detach stone blades, phalanges as gentle retouchers for edge shaping, and even teeth as pressure flakers for precision finishing work.⁷
• Hide-working tools: Lissoirs and scrapers for softening, degreasing, and polishing animal skins. As noted above, these are the bone tools that upended assumptions about Neandertal cognition.
• Fish hooks: Bone hooks appear at coastal and riverine sites across multiple continents. At the Epipaleolithic site of Jordan River Dureijat in northern Israel, a large assemblage of bone fish hooks includes the earliest known examples of barbed hooks and lure attachments, revealing a surprisingly sophisticated fishing technology.⁸
• Needles: Eyed needles, carved from bone slivers, enabled the creation of fitted garments. Their appearance in the Paleolithic record is linked not just to basic warmth but to the development of layered clothing systems and the decoration of garments rather than the body itself.⁹

Bone bipoints, double-ended pointed implements found at South African coastal sites, illustrate how tricky functional interpretation can be. The coincidence of many bipoints with heavy shellfish exploitation initially led researchers to propose they were used to pry limpets off rocks. Experimental testing, however, failed to support that hypothesis; the wear traces on bipoints used for shellfish prying did not match the patterns on the archaeological specimens.¹⁰ Their actual function remains debated, a reminder that the presence of a bone artifact at a site does not automatically tell you what it was for.

Why Bone Was Chosen Over Stone

Stone tools tend to get the spotlight in discussions of prehistory, and for good reason: they are far more durable and survive in greater numbers. But bone offered properties that stone could not easily replicate. Bone is naturally flexible and resilient. It can be carved into thin, elongated shapes like needles and hooks that would snap instantly if made from flint. It absorbs shock differently, making it effective for tasks like hide burnishing where a hard, sharp stone edge would cut rather than smooth. And bone could be worked into curves and tapered points that followed the material’s own grain, no flaking geometry required.

Not all bone is created equal. Fracture toughness, the resistance to cracking, varies considerably across species. Research comparing the cortical bone of several mammalian groups found that canine (dog-family) bone had the highest fracture toughness values, while bovid bone had the lowest.¹¹ This helps explain patterns in the archaeological record. Toolmakers gravitated toward bones from the animals available to them, but when they had choices, they often selected specific skeletal elements and species. The Vinča culture’s strong preference for sheep and goat metapodials, for example, reflects not just the abundance of those animals but the mechanical suitability of those particular long, straight, dense-walled bones for pointed tools.⁶

Antler, though technically not bone but rather a keratinous and bony outgrowth, was another widely used raw material, particularly in European Upper Paleolithic and Mesolithic contexts. It is tougher and more elastic than most cortical bone, which made it ideal for handles, harpoon points, and pressure-flaking tools. The distinction between bone, antler, ivory, and horn matters for researchers because each material has different structural properties and responds differently to shaping techniques.¹²

How Bone Tools Were Made

The production of a bone tool involves a different logic than stone knapping. Stone is shaped by controlled fracture: you remove what you don’t want. Bone resists clean fracture in most orientations, so toolmakers developed a range of techniques built around grinding, splitting, soaking, and abrasion.

One of the best-documented prehistoric bone-working methods is groove-and-splinter. The toolmaker scores two parallel grooves along a long bone or antler beam, then levers out the strip between them to create a blank. This technique was widespread in the Upper Paleolithic and later periods. Experimental archaeology shows that the condition of the raw material makes an enormous difference. In trials working antler, removing a blank from a dry beam took about seven hours. After soaking the antler with its spongy interior (cancellous bone) left exposed, the same operation dropped to roughly two and a half hours. The key is water penetration into the porous interior: once the cancellous tissue absorbs and retains water, the antler becomes dramatically easier to cut and groove.¹³

Soaking experiments identified a threshold at around four hours: before that point, there was no meaningful difference in workability between sealed and unsealed antler. After four hours, unsealed antler (with the inner spongy structure exposed to water) became much more pliable than sealed pieces where the dense outer surface prevented absorption.¹³ Ethnographic and experimental evidence suggests that prehistoric people also softened bone and antler using substances beyond plain water, including sour milk, sorrel juice, urine, and lye, though how far back such chemical softening methods go remains difficult to pin down archaeologically.¹⁴

Once a blank was extracted, the final shaping usually involved grinding against a coarse stone surface. Experimental work on grinding techniques demonstrates that different stone materials and techniques leave distinctive micro-wear signatures: characteristic striations, polish patterns, and surface textures that archaeologists can use to reconstruct how a given tool was finished.¹⁵

Symbolic and Artistic Uses

Bone was not only a utilitarian material. Some of the most evocative evidence for symbolic thought in deep prehistory comes from deliberate engravings on bone surfaces. At Nesher Ramla in Israel, an aurochs bone shaft dating to around 120,000 years ago bears six intentionally produced incisions, apparently made in a single session with a retouched flint flake held in a right hand. The pattern is abstract, with no obvious functional purpose, pointing toward symbolic behavior in the Levantine Middle Paleolithic.¹⁶

Similar engravings from the Chinese site of Lingjing, attributed to archaic hominins, show deliberate sub-parallel lines incised on weathered bone, some of which were clearly made after the bone had already fractured and dried, ruling out butchery as an explanation.¹⁷ And in northern Germany, a giant deer phalanx from Einhornhöhle, at least 51,000 years old and from a Neandertal context, carries a chevron-like engraved design. The researchers argued this demonstrates conceptual imagination: the capacity to compose individual lines into a coherent pattern, and therefore an awareness of symbolic meaning that predates the arrival of modern humans in Central Europe.¹⁸

Beyond engravings, bone served as a medium for music. Bone and ivory flutes from the early Aurignacian period in southwestern Germany, more than 35,000 years old, document what researchers describe as a well-established musical tradition at the time modern humans first colonized Europe.¹⁹ The flutes are made from bird bones and mammoth ivory, both materials offering the combination of a hollow or easily hollowed interior and walls strong enough to withstand the pressures of blowing and fingering.

Telling Human-Made Tools from Natural Damage

One of the trickiest problems in bone-tool research is distinguishing intentionally worked bone from bone that was gnawed, trampled, or otherwise altered by natural processes. A carnivore chewing on a long bone can produce marks and flake scars that superficially resemble the damage left by a hominin using that bone as a hammer. This has led to genuine misattributions at important sites. At the Acheulean Horse Butchery Site at Boxgrove and at Gough’s Cave, bone knapping tools were initially attributed to carnivore chewing before more detailed analysis using microscopy and high-resolution imaging corrected the interpretation.²⁰

Quantitative approaches help. Work on bovid long bones showed that percussion notches (from hammerstone use) and tooth notches (from carnivore gnawing) differ in measurable ways. Percussion notches tend to be broader, shallower, and more frequent, and the flake scars they leave have a more obtuse release angle. These differences are statistically robust for bones from smaller animals, though they become harder to distinguish on larger bones.²¹ The advantage of notch analysis over surface-mark analysis is durability: notches penetrate the full thickness of the bone wall, so they survive weathering and chemical corrosion better than shallow cut marks or scratch patterns.

Even at the analytical stage, careful preparation matters. Residues and contaminants on excavated bones can conceal genuine use-wear or be mistaken for it. Research into cleaning protocols for bone artifacts has tested various agents and found that some cleaning products alter the bone surface at the microscopic level, potentially creating or destroying the very features analysts need to read.²² The takeaway for the field is that handling and cleaning bone artifacts requires as much methodological rigor as the analysis itself.

What Molecular Analysis Is Revealing

A growing frontier in bone-tool research involves extracting biological information directly from the artifacts themselves. ZooMS, the collagen-fingerprinting technique used on the Neandertal lissoirs, has been applied to collections worldwide. In a study of bone tools from the South American lowlands in the Paraná Basin, ZooMS analysis identified lamoid (llama-family) bones in 13 out of 32 tools sampled, a finding that was invisible to traditional visual identification. This kind of result reshapes our understanding of which animals past peoples were exploiting and which bones they considered worth shaping into tools.²³

The appeal of ZooMS is that it requires only a tiny sample of collagen, making it minimally destructive. For heavily worked bone tools where the external surface has been ground away and no anatomical landmarks survive, traditional identification based on shape is often impossible. Molecular methods bypass that problem entirely, reading the species signature from the protein structure of the bone itself. As these techniques become more routine and affordable, they are likely to reveal patterns of raw-material selection, trade, and animal exploitation that the visible archaeological record alone cannot.