I can't tell much about the carved pendant from the image provided. I have no idea how the work may have been done - laser technology may even be possible.

Below is a link to the site search for "amber" going back 600 days - there are 152 messages. Not every one may be relevant to your interests, but it is still a very handy function. Please feel free to experiment with the search feature and feel free to read the entire forum, some members actually have done this. This is why we try to keep the entire thing saved.