“Diamonds” is not a sufficiently precise description for an international cargo assessment. One important distinction is whether a stone is rough or polished. The classification may affect customs descriptions, documentation and specific certification requirements.
What is a rough diamond?
A rough diamond is unworked or only minimally processed within the relevant legal definitions. International trade in rough diamonds is subject to the Kimberley Process Certification Scheme in participating jurisdictions. Certificates and related restrictions address rough diamond shipments rather than every diamond product.
What is a polished diamond?
A polished diamond has undergone cutting and polishing. A loose polished diamond is not automatically subject to the Kimberley Process rough-diamond certificate requirement just because it is a diamond. It still requires truthful descriptions and compliance with the ordinary customs, origin, sanctions and other applicable trade rules.
U.S. Customs and Border Protection distinguishes rough-diamond certificate requirements from the rules applicable to other diamond imports in its gemstone import guidance.
Useful information for a polished-diamond manifest
- Individual stone count and carat weight
- Shape, cut and identifying characteristics
- Color, clarity or grading description where reliable information exists
- Gemological laboratory report numbers, if available
- Natural, laboratory-grown or imitation classification as applicable
- Ownership, declared value and provenance records
The U.S. Federal Trade Commission advises accurate descriptions for gemstones and relevant product characteristics. See the FTC Jewelry Guides.
Why correct classification matters
Incorrectly classifying rough stones as polished—or describing laboratory-grown stones as mined natural diamonds—can create misstatements in customs and commercial paperwork. Errors may cause delays, valuation problems or regulatory scrutiny.
Before choosing a carrier
Provide a factual commodity description and ask whether the service accepts loose polished gemstones, the stated valuation and the requested destination. A general courier quote does not establish acceptance of valuable loose stones.
Editorial note: This article is general shipping information, not legal, customs, tax or insurance advice. Requirements can change and depend on the specific goods, route, parties and carrier. Obtain written confirmation from the appropriate authorities and service providers.
Planning a consignment? Review our gold and diamond service guide or send a general enquiry. A website enquiry does not confirm booking, insurance or dispatch.