tree resin hardened over time up to 1000 years️️amber

inmature amber️️copal

most valuable amber️️transparent red

cause amber color change over time️️oxidation

circular marks sometimes left in amber when heat and oil it️️sun spangles

coral most valuable color️️intense red

color of conchiolin coral️️black and gold

most valuable ivory️️elephant tusks

ornamental form of lignite coal️️jet

major jet source️️England

A natural, inorganic substance with a...