Stone(s): genuine amber Color: yellow, dark caramel, blue (under UV) Dimensions: approx. 4–6 cm x 2–3 cm Approximate weight: about 5 to 10 g Shape: polished pebble Number of pieces: sold individually Special properties: fluorescence. Sumatra amber reveals a blue luminescence under UV light. Aromatic compounds are responsible for the fluorescence. On an opaque black surface, the blue color can also be seen in sunlight Classification: Organic compounds (fossil resin) Mohs hardness: 2-2.5 Density: 1 to 1.2 Origin: Indonesia Care instructions: Clean amber with a damp cloth. As amber is a soft resin, do not bring it into contact with abrasive elements that could scratch it. Avoid exposure to high heat. Also avoid repeated exposure to soap/shower gel, cosmetics (perfume, etc.), or household products, as amber could turn white. Photos are non-contractual. The piece sent will be of similar quality and color to the pieces photographed. The photos show a sample of the pieces for sale. The pieces are shown under natural light and under UV light to highlight their fluorescence.