Baltic amber stone with fossil insect - very rare large darkling beetle Tenebrioninae, probably Alphitobiini.
It weighs 7.1 grams. Measurements of stone 52x28x8mm, length of insect body and head ~ 11mm, max ~ 13mm.
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.