Baltic amber stone with fossil insect - ant probably Bradoponera.
It weighs 0.3 grams. Measurements of stone 13x9x3mm, length of ant body and head ~ 2.2mm.
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.