Unfortunately I know nothing about these.  They are made of three differing materials.  

Google search says:

•  two are made of obsidian.  
• The red tone stone is jasper.  Appears to be stone age lithic tool.  It exhibits characteristics of Paleoithic tools.  Shape suggests it was a versatile tool for cutting, scraping, or chopping.  
• Tan piece with dark flecks - appears to be Native American made of petrified wood or chert.  
• The wider piece is said to be a celt, prehistoric polished stone axe or adze head
• The very pointy one - stone projectile point, arrowhead, made from likely chert or flint

The tape is in cm.