Identifying an arrowhead starts with confirming it was shaped by human hands, then examining its overall shape, base style, and size to narrow down its type and approximate age. Most “arrowheads” people find are technically projectile points, a broader category that includes spear tips and dart points alongside true arrow tips. The differences between them come down to measurable features you can learn to spot with practice.
Human-Made or Natural Rock?
The first question is whether you’re looking at a stone shaped by a person or one broken by nature. Rocks crack and chip all the time from freezing, falling, or tumbling in a river, and the results can sometimes look intentional. The key difference is patterning. A knapped stone tool shows deliberate, repeated flake removals working in from the edges, creating a symmetrical or clearly functional shape. A naturally broken rock tends to fracture randomly, with no consistent direction to the chipping.
The most reliable indicator of human work is a feature called a bulb of percussion on individual flake scars. When a toolmaker strikes a stone, the force radiates outward from the impact point, leaving a subtle rounded bulge on the surface where the flake detached. Natural fractures can produce similar bulges, but human-knapped tools show them repeatedly and consistently along the worked edges. Look also for ripple marks radiating outward from strike points, like the rings that spread when you drop a pebble in water. If you see a symmetrical outline, uniform thinning on both faces, and deliberate edge shaping, you’re almost certainly holding something made by a person.
Parts of a Projectile Point
Learning the basic anatomy of a point gives you a shared vocabulary for looking things up in guides and databases. Every projectile point has two main zones: the blade and the hafting area.
- Tip: The sharp top (distal) end, designed to penetrate.
- Blade: The wide body of the point, including the cutting edges. This is the portion above where the point was attached to a shaft.
- Shoulders: The widest part of the point, where the blade meets the hafting area. Some points have pronounced shoulders that jut outward; others taper smoothly with no obvious shoulder.
- Hafting area: The bottom portion where the point was lashed or glued to a wooden shaft. This is where you’ll find the features most useful for identification: notches, stems, and the base.
- Base: The very bottom edge. It can be flat, concave (curved inward), convex (rounded outward), or pointed.
When you’re trying to identify a point, the hafting area is where you should focus most of your attention. The blade shape helps, but the base and stem design are what distinguish one type from another.
Main Shape Categories
Projectile points fall into a few broad morphological groups based on how the hafting area is shaped. Once you can place a point into one of these categories, you’ve dramatically narrowed your search.
Lanceolate points have parallel or nearly parallel blade edges and no notches or stem. They’re often leaf-shaped or elongated, with the widest part near the middle. Many of the oldest points in North America are lanceolate. Some lanceolate points are “fluted,” meaning a long, narrow flake was removed from the base running parallel to the blade edges, creating a channel or groove. Fluted points like Clovis and Cumberland are among the most recognizable (and sought-after) types.
Notched points have indentations cut into the hafting area to help secure the point to a shaft. The placement of those notches is a major identification clue. Side-notched points have notches cut in from the sides. Corner-notched points have notches placed at the corners where the blade meets the base, creating small barb-like projections. Ear-notched points have notches placed near the base’s lower corners.
Stemmed points have a distinct projection, or stem, extending downward from the shoulders. The stem was inserted into a slot in the shaft. Stems come in three basic shapes: straight (parallel-sided), contracting (narrowing to a point), and expanding (widening toward the base). A contracting stem looks like a narrow tang, while an expanding stem flares outward and can resemble a fishtail.
Triangular points are just what they sound like: simple triangles with no stem or notches. Many late-period arrow points are small, thin triangles.
Size Tells You How It Was Used
Not every stone point is an “arrowhead.” The bow and arrow didn’t become widespread in most of North America until roughly 1,500 to 2,000 years ago. Before that, people used the atlatl (a spear-throwing device) and hand-thrown spears, both of which required larger, heavier points.
As a rough guide, true arrow points tend to be small and light, often under an inch and a half long and quite thin. Dart points used with an atlatl are typically larger, in the range of two to four inches. Spear points can be larger still. There’s overlap between categories, and archaeologists debate exact thresholds, but size is a useful first filter. If you’ve found something four inches long, it was almost certainly a spear or dart tip, not an arrowhead. If it’s a thin, delicate triangle about an inch long, it was likely shot from a bow.
Estimating Age From Shape
Point styles changed over thousands of years, so the shape of a point can place it within a general time period. This isn’t precise dating, but it gives you a ballpark.
Paleo Period (16,000–8,000 B.C.)
The earliest people in North America hunted large, now-extinct animals like mastodons, giant beavers, and ancient bison. Their points are large, lanceolate, and often fluted. Clovis points, with their distinctive basal fluting, are the most famous examples. If you find a fluted lanceolate point, it likely dates to this era and is a significant find.
Archaic Period (8,000–1,000 B.C.)
A warming climate shifted diets toward white-tailed deer, fish, nuts, and wild plants. The atlatl came into wide use during the Early Archaic (8,000–5,000 B.C.), allowing hunters to throw projectiles farther and more accurately. Points from this long era are diverse: notched and stemmed forms become common. Named types like Kirk, LeCroy, and St. Albans belong to the Early Archaic. By the Late Archaic (3,000–1,000 B.C.), people were beginning to cultivate squashes and gourds, living in larger settlements, and producing broader, heavier points like the Lamoka and Savannah River types.
Woodland Period (1,000 B.C.–A.D. 1,500)
This period brought ceramic pottery, expanded crop farming, and more elaborate burial practices. The bow and arrow appeared and gradually replaced the atlatl, so points trend smaller and lighter over time. Early Woodland points like the Adena and Robbins types are associated with the Adena Culture across much of the Mid-Atlantic region. By the Late Woodland period, many groups were using small, simple triangular points suited to arrow shafts.
Using Regional Guides for Specific Types
Point types vary enormously by region. A point style common in the Ohio River Valley may not exist in the Desert Southwest. The most reliable way to identify a specific type is to use a regional typology guide. Many state museums and archaeological surveys maintain reference collections with photographs and descriptions. The New York State Museum, for example, hosts an online version of William A. Ritchie’s “Typology and Nomenclature for New York Projectile Points,” a foundational reference for Northeastern archaeology originally published in 1961 and still widely used.
Search for your state’s name plus “projectile point identification guide” and you’ll often find databases maintained by universities, state museums, or archaeological societies. These guides organize points by shape, size, time period, and geographic range, letting you compare your find against known types. The USDA’s Natural Resources Conservation Service also publishes regional point guides with illustrated examples organized by era.
When comparing your point to a guide, pay closest attention to the hafting area (notched, stemmed, or unnotched), the base shape (concave, straight, or convex), overall size, and the cross-section thickness. Blade shape matters, but blades were often resharpened over their use-life, so a point’s blade may be narrower or more asymmetrical than the “textbook” version of its type.
Legal Rules for Collecting
Federal law under the Archaeological Resources Protection Act makes it illegal to excavate, remove, or damage any archaeological resource on public lands or Indian lands without a permit. Violations can carry criminal penalties, and trafficking in illegally collected artifacts across state lines is separately prohibited.
There is one narrow exception in the federal law: picking up arrowheads found on the surface of the ground on public land is not subject to the criminal penalties in one specific subsection of the Act. However, this exception is limited, and federal land managers (the Bureau of Land Management, Forest Service, etc.) may still enforce their own regulations. In practice, collecting from public land is risky and generally discouraged.
On private land, the law is clearer. The Archaeological Resources Protection Act explicitly does not apply to private property. If you have the landowner’s permission (or it’s your own land), collecting surface finds is legal under federal law. State laws vary, though, so check your state’s specific rules. Some states require reporting significant finds or restrict collecting even on private land in certain circumstances.
Wherever you find a point, documenting the exact location before you pick it up adds enormous value. A point with a known find spot contributes to archaeological knowledge. One without context is just a curiosity. Photograph it in place, note the GPS coordinates, and record the soil type and any nearby features. Even if you keep the artifact, that information can help researchers understand settlement patterns and land use in your area.