Baltic amber stone with fossil inclusion - mayfly Ephemeroptera.
It weighs 0.6 grams. Measurements of stone 21x12x4mm, length of insect body and head ~ 5.4mm, with wings ~ 8.7mm.
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.