Help needed to identify rough stones!

[Rpmk]

Hello all, I have little experience with gemstones and found these with a collection of jewellery at auction.

I understand its difficult to tell from photos but can anyone see anything that would indicate what they are? I assumed the chips were maybe garnets?

Any advice or information from the more knowledgeable will be much appreciated. Thank you

 

[PrecisionGem]

Corundum (ruby). But not facet grade. This type of material can be cut into cabs.