Jewelry Vintage Amber Marquis Pendant Wpearls Poshmark 8mm Strawberry Quartz Post Earrings A.Wyckoff Handmade Jewelry Jewelry Vintage Amber Marquis Pendant Wpearls Poshmark 14k Gold Amber Post Earrings Dixon's Auction at Crumpton Jewelry Vintage Amber Marquis Pendant Wpearls Poshmark. Metal: Sterling Silver Backing: Post Length: 1 2" Width: 1 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.