To spot a fake Roman gladius in 2025, examine the blade’s material and craftsmanship—authentic replicas use high-carbon or Damascus steel, not cheap alloys. Check weight and balance, as real designs feel sturdy and well-proportioned. Genuine replicas often show careful aging or patina, not artificial shine. Verify maker’s marks, reputation, and source to ensure authenticity. Researching trusted sellers is key to avoiding mass-produced imitations.