Baltic amber stone with fossil insect - longhorn beetle larvae Cerambycidae, probably Lepturinae.
It weighs 0.6 grams. Measurements of stone 18x8x6mm, length of larvae ~ 3mm.
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.