vocabulary: material type non-genetic aggregation class
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From review of ESSDIVE material terms, material types that are granular aggregations are not fully handled. We have sediment and soil, but don't have a clear way to handle things like manufactured sand and gravel. Sediment and soil are material classes that have strong genetic connotation. Classes like gravel, sand, silt, mud can be viewed as strictly grain-size classification based, but are commonly used with genetic connotation of sedimentary deposition. Clay is even worse-- there is a grain size view, and a mineralogy view; these are partly-orthogonal. Consider adding a non-genetic granular particle aggregation class with no genetic connotation; particulate would be a subclass with very-fine grain size. Clay-size/mineralogic powder would be particulate. Moisted or hardened (not fired ceramic) clay (size or mineralogy) that forms cohesive blobs would be solid object?
On further consideration, manufactured sand or gravel would be 'Anthropogenic material' Defined as 'Non-metallic material produced by human activity.... Include lab preparations like XRF pellet and rock powders. Examples: ceramics, concrete, slag, (anthropogenic) glass, mine tailing, plaster, waste.' SpecimenType would be 'Aggregation'.