Baltic amber stone with inclusion - spider Synotaxidae, Acrometa cristata.
It weighs 0.5 grams. Measurements of stone 11x9x4mm, length of spider max ~ 4.5mm,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.