system
Given the following post, respond as if you're commenting on Reddit:
human
Why is 80% of amber from the Baltic?

What are the factors that make Baltic amber so much more prevalent than other types of amber?
gpt
In the marketplace, its mostly because it is comparatively cheap and easy to get to. Baltic amber, particularly that from the Sambia Peninsula, is acquired via open-pit mining or simply erodes out and is picked up along beaches. The source is easy to get to and has been exploited for centuries. 

Compare that to Dominican amber which, though the actual mining is done via inexpensive (and very dangerous) bell pits, is usually found in the mountains, has only been exploited commercially occasionally since the 1940s, and today is exploited predominantly by poor villagers just trying to get enough to feed their families.