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Shyam Sarowar brings for you gold testing stone - Crafted from genuine natural obsidian, this Kasauti stone features a jet black surface, providing a high contrast background for accurate gold testing. Smooth Surface: Designed with a smooth, non-reactive surface, it ensures precise and reliable testing of gold samples. Convenient Size: Measuring 2*2 & 3*2 this stone is compact and easy to handle, making it perfect for on-the-go testing and convenient storage. Versatile Use: Ideal for use in jewelry stores, workshops, pawnshops, trade shows, and personal collections, this testing stone is an essential tool for jewelers and goldsmiths. Durable and Reliable: Resistant to the corrosive effects of testing acids, this durable stone remains intact and unaffected during the testing process. Ensure the quality and purity of your gold with this high-quality, natural obsidian Kasauti stone, designed for professional and personal use.