Mineral with spherical protrusions Weight: 8.4 kg, Width: 18 cm, Height: 22 cm, Viewing stone, natural stone, mineral, ornament - Type: Mineral - Shape: Irregular mass - Texture: Rough surface - Features: Numerous small spherical protrusions The image is of **botryoidal pyrite (budojō ōtekkō)**. Pyrite (ōtekkō) is a mineral composed of iron sulfide, with a metallic luster and a pale yellow color. Botryoidal pyrite is pyrite that has formed into a cluster of rounded grains, resembling a bunch of grapes. This mineral belongs to the isometric crystal system and can also be found as crystals in the form of cubes or octahedrons. Botryoidal nephrite jade This image is of a natural stone that forms small spherical aggregates (botryoidal) and is considered to be "botryoidal nephrite jade." Due to its distinctive shape, it is sometimes called grape agate or wart stone. Such botryoidal structures can also be found in other minerals such as chalcedony, agate, and epidote, but based on the greenish color and texture in the image, it is highly likely to be nephrite jade. Features Botryoidal structure: A shape that looks like a bunch of grapes, formed by the aggregation of small spheres. Color: Greenish gray or green. Other names: Grape agate, wart stone, etc. The location of the stone is based on AI's interpretation and not the seller's. Please make your own judgment based on the image. Thank you for viewing. Purchase without comments is welcome. Shipping will be via Rakuraku Mercari.