AMB-R-01 Origin: Lithuania Grade: A+ Dimensions: Each stone measures approximately 15mm to 20mm. Weight: 5g Origin: Lithuania Grade: A+ = very good Lot of tumbled Baltic Sea amber stones weighing 5g. Approximately 4-5 stones (may vary from batch to batch) Amber, a name derived from the Arabic "antar," is a resin that has mineralized over the years. It can contain elements of animal origin, insects, or feathers. Amber stone has existed for thousands of years: it was even used during prehistoric times in the making of jewelry, art objects, and ornaments. It is believed to have formed in the Baltic Sea 40 to 60 million years ago.