There are about 60 known varieties (species) of amber. The oldest of them come from Devonian formations (found in Canada) and Carboniferous (Illinois, USA); the youngest, not generally classified as amber, are found in South America, Africa, Australia and New Zealand.
Drewnem Pisane (Wood Written) - Behind the scene - How a pen is made. 21 Production of resin blocks - amber is also resin.
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