Baltic amber stone with fossil inclusion - very rare badly preserved aquatic mayfly Ephemeroptera nymph.
It weighs 0.4 grams. Measurements of stone 23x7x3mm, length of insect ~ 3.2mm.
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.