Amber, Fossilized Tree Resin Pieces in Orange Color Stock Photo Image Amber Made Of Yellow Transparent Fossil Resin With Insect Inclusions Amber: Ultimate Guide To Collecting Amber (What It Is and How To Find Fossils (Amber) UK Fossils Amber is made of yellow transparent fossil resin with insect inclusions amber Kids Britannica Kids Homework Help. Metal: Sterling Silver Length: 2" Width: 3 4" Amber is hardened tree resin from prehistoric forests 40 50 million years ago. Though its transparency and color varies, the most common colors are orange, yellow and brown. Amber can also range into milky whites and deep reds. Your piece was designed and set in sterling silver by Polish craftsmen. The amber carried at Green River Silver Co. comes from the Baltic region and is imported directly from Gdansk, Poland.