Natural Sumatran amber, not treated. Large piece of 4 kg measurements ± 27 x 18 x 16 cm Sumatran amber is fossilized tree resin, primarily sourced from the Bukit Barisan mountain range and South Sumatra basin. Dating back 15–30 million years, this highly sought-after material is famous for its rarity, its distinct aromatic fragrance, and its captivating blue fluorescence under UV light (please see photos as the part of the description) Amber clears depression, stimulates the intellect and promotes self-confidence and creative self-expression. It encourages decision-making, spontaneity and brings wisdom, balance and patience. Note: The shade/color of the product may vary slightly depending on the viewing angle, lighting intensity and direction, background color, as well as individual screen settings (brightness, contrast, color display, etc.). Shipping: safely packed, courier mail with tracked ID. Usual time of delivery: 2-5 business days.