CERTIFIED AMBER: All Amber in this necklace are 100% Natural Baltic Amber; CERTIFIED AMBER: All Amber in this necklace are 100% Natural Baltic Amber; Handmade Necklace ~13 inch., Bracelet 5.5 inch VERY IMPORTANT - Measure before buying - Choose the right size for you FORMED BY NATURE - Love the fact these amber were part of the trees many years ago! Amber Necklace + Bracelet. Baltic Amber is fossil of resin that is like sap which formed over 45millions years old from Baltic sea region of Europe. Although not a mineral, it is generally classified as a gemstone. A common misconception is that Amber is made of tree sap. Sap is the fluid that circulates through a plant's vascular system, while resin is the semi-solid amorphous organic substance secreted in pockets and canals through epithelial cells of the tree. adult