Available in three convenient sizes: 100 grams, 500 grams, and 1 kilogram options to suit your collection needs Sumatran Amber is found in the Indonesian archipelago on the island of Sumatra and is one of the rare forms of Amber that have ultraviolet properties, meaning they fluoresce blue in natural UV light. This special material can be found in a range of color from white, cognac, lion's mane and even violet and black. This listing contains a mix of natural cognac and honey hues. Each Amber Lot is naturally unique and thoughtfully selected, however the one you receive may differ slightly than the image, though overall the shapes and color balance will be similar. Starborn Creations has been a long-trusted source of authentic Sumatran amber, sourced with expertise and integrity. Care Note: Natural amber is sensitive to heat, sunlight, chemicals, adhesives, and abrasion. Avoid exposure to perfumes, lotions, cleaners, and hot environments. Do not use ultrasonic or steam cleaners. Clean with a soft cloth and store separately from harder stones to help preserve its polish and natural beauty.