7102.21 - Unworked or simply sawn, cleaved or bruted:

This HTS category, 7102.21, encompasses diamonds that are unworked or have undergone only basic processing such as sawing, cleaving, or bruting. These initial stages of preparation aim to shape the rough diamond into a more manageable form for further cutting and polishing, but they do not constitute a finished gem. The key characteristic is the lack of advanced craftsmanship that would elevate the diamond to a higher classification.

Distinguishing 7102.21 from its sibling category, 7102.29.00 ("Other"), is crucial. While 7102.21 is strictly for unworked or simply sawn, cleaved, or bruted diamonds, the "Other" category would typically cover industrial diamonds that fall outside these specific preliminary processing stages. This might include diamonds that have undergone slightly more advanced, yet still industrial-grade, treatments that are not explicitly defined under the "unworked or simply sawn, cleaved or bruted" criteria.

Within this classification, two subcategories exist: "Miners' diamonds" (7102.21.10) and "Other." Miners' diamonds are those still in their raw, natural state as extracted from the earth, requiring immediate processing. The "Other" subcategory, within the context of 7102.21, would likely capture diamonds that have undergone the specified simple working processes but are not yet considered fully cut or polished gemstones, differentiating them from the "Miners' diamonds" still in their absolutely raw state.