It can be of many types, including proteinaceous, agglutinated (exogenous agglomerate), porcelain-like (smooth calcite) or hyalin (lens). Foraminifera with multi-chambered tests are referred to as multilocular and develop by building new chambers in their test.
It can be in various forms, such as protein-based, aggregated (external agglomeration), porcelain-like (smooth calcite) or glassy (lens). Foraminifera with multi-chambered tests are referred to as multilocular and grow by adding new chambers to their test.