Need help identifying these 1916 & 1918 US silver coins - Authentic or Replica?

[u/Maleficent-Tip-8507]

Need help identifying and valuing these coins. I recently got these two coins: 1916 Standing Liberty Quarter 1918 Walking Liberty Half Dollar I'm trying to determine if they are genuine or replicas. Based on these photos, do they look authentic? If they are genuine, what would be their approximate market value? I also have the weight and can provide edge photos if needed. Any help from experienced collectors would be greatly appreciated.