Baltic amber stone with inclusions - rare genus of moss (Bryophyta), probably Trachycystis "notched leaves"
It weighs 0.8 grams. Measurements of stone 26x11x4mm, length of plant twig max ~ 14mm.
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.