Baltic amber stone with fossil insect - great looking unusual beetle larvae, probably some Chrysomelidae.
It weighs 0.4 grams. Measurements of stone 15x10x4mm, length of larvae ~ 2.8mm (curled).
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.