What natural means here, precisely
Natural amber is fossil resin that has been cut and polished and nothing else: not reconstituted, not heat-clarified into an artificial sunspangle pattern, not dyed. Inclusions, cloudiness and colour variation are preserved because they are the evidence of what the material is.
This matters commercially because pressed amber — genuine amber reconstituted under heat and pressure — is a legitimate and often correct product that must never be sold as natural. We disclose which is which on every quotation, and we would rather lose an order than blur it.