Baltic amber stone with fossil inclusion - extremely rare aquatic mayfly Ephemeroptera nymph and plant splint.
It weighs 2.3 grams. Measurements of stone 34x20x6mm, length of insect max ~ 4.5mm.
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.