Trio of polished stone pendants in rich earth tones

I'm not sure what stones these three are, but they all have wonderful colour and shape. They are uneven naturally, with patches of roughness, but there are no significant chips, cracks or scratches. The second and third pictures show the pendants from both sides. From just under an inch to about 1-3/4 inches in length, with place for a fairly substantial chain or thin cord. (/d)