What it looks for
- Triangular or tapered silhouettes
- Dark gray, black, brown, or glossy tooth-like contrast
- Pointed tip plus wider root-like base
- Edges that stand out from sand and shell texture
Field tips
- Use bright indirect light; avoid harsh glare.
- Wet sand often gives stronger contrast.
- Move slowly; pause over highlighted boxes.
- Tap “Calibrate sand” when lighting changes.
Assistive pattern recognition only — not a guarantee. Always visually confirm finds before collecting, and follow local beach fossil rules.