7102.21.10 - Miners' diamonds

This HTS category, 7102.21.10, specifically encompasses "miners' diamonds." These are diamonds in their natural, raw state as extracted from the earth, which have not undergone any significant working beyond basic preparation such as sawing, cleaving, or bruting. The key characteristic is their unworked or minimally processed condition, directly reflecting their origin from mining operations.

Within the broader classification of "Diamonds, whether or not worked, but not mounted or set," this subcategory distinguishes itself by focusing exclusively on industrial diamonds in their rough form. It is distinct from the "Other" sibling category, which would likely include worked or processed diamonds that do not fit the specific definition of miners' diamonds, or potentially diamonds of gem quality that haven't been worked.

The subcategories 7102.21.10.10 for "Carbonados" and 7102.21.10.20 for "Other" further refine the classification of these unworked industrial diamonds. Carbonados are a specific type of industrial diamond known for their opaque, granular structure. The "Other" subcategory captures any remaining unworked industrial diamonds that do not fall under the specific definition of carbonados, allowing for comprehensive classification of this raw material based on specific types or general remaining categories.