Rock and Gem Shop › Columbian Copal Image 1 of 1 Columbian Copal $5.00 Coal is young tree resin that is aged 100,000 years to 3 million years old. $5 each Quantity: Purchase Added! Coal is young tree resin that is aged 100,000 years to 3 million years old. $5 each Reviews Reviewer Name Review Date Star Rating Description Posted on Etsy Product Show More