Baltic amber stone with inclusion - larval case probably with larva inside, in building the case some insect parts were used..
It weighs 0.3 grams. Measurements of stone 16x5x5mm, length of case ~ 6.5mm.
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.