Baltic amber stone with fossil inclusion - giant larva, probably moth caterpillar Lepidoptera.
It weighs 3.1 grams. Measurements of stone 31x19x9mm, length of larva ~ 13.5mm.
I can send digital high resolution picture by e-mail for personal (not commercial) use. Contact me concerning it.
If you which stone can be made into pendant for free. Please check if stone measurements are suitable for you.