Amber, crystal clear, beautiful color, welcomed by the world. Legend has it that amber was made by the tears of the ancient Greek goddess Herlithus. In my country, it is believed that amber is the soul change after the death of the tiger. Amber is actually a petrochemical product of plant resin in the geological era. It is a pine resin fossil 40 million years ago. It is a kind of solid biological fossil. Its main components are carbon, hydrogen, oxygen and a small amount of sulfur, hardness of 2-3, specific gravity of 1.05-1.1, melting point of 150c-180c, and ignition point of 250c-375c. Amber, pearls and corals are the three organic gemstones. Amber is amorphous and is an irregular mass ranging in size from fine particles to large pounds. Unprocessed raw resin gloss, after polishing, from resin luster to near glass luster. Hardness is only 2-2.5. It can be easily cut with a knife, with poor toughness and cracks in the shape of a shell. The specific gravity of transparent amber is about 1.05 to 1.09, and the turbidity contains a large amount of bubbles with a specific gravity as low as 1.0. The refractive index of amber varies slightly, but is usually close to 1.54, as low as 1.539 and as high as 1.545. Because amber is an amorphous substance, it is isotropic, has no cleavage, no pleochroism, and no birefringence. It is classified as a fatty amber based on lack of toughness, powdery inclusions, grease luster, glass breakage, and the ability to be highly polished.
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