Agglomerate from Italy. Comes with certificate of authenticity. Minerals collection. Type: volcanic igneous rocks. Stone type: Agglomerate. Dominant color: multicolored. Origin: Italy. Average weight (Carats): 26.4 carats. Dimensions (mm): 17 x 17 x 15 mm. Ref. : SKU030553. Rocks formed by the compaction and cementation of sediments, such as sandstone, limestone, and shale.