HS Code for Rough synthetic gemstones

Rough synthetic gemstones are classified under HS code 7104.29. This code is used for stones that are lab-created or reconstructed but possess the same chemical, physical, and optical properties as natural precious or semi-precious stones. The 'rough' designation implies that the material is unworked, simply sawn, or roughly shaped into boules, blocks, or crystals. This subheading is a residual category for synthetic stones other than synthetic diamonds (which have their own specific code). Synthetic stones are often produced using methods like the Verneuil (flame fusion) process, Czochralski (crystal pulling) process, or hydrothermal growth. The resulting material, often in the form of a 'boule,' is classified here before it is sent to lapidaries for faceting or polishing. Reconstructed stones, made by pressing together fragments of natural stones into a solid mass, also fall under this classification.

Products Included

• Synthetic ruby boules (unworked)
• Lab-grown sapphire crystals (rough)
• Uncut synthetic alexandrite
• Reconstructed turquoise blocks (unworked)
• Synthetic emerald rough from hydrothermal growth

Common Misclassification

The most frequent misclassification is with HS code 7104.21, which is specifically for unworked synthetic diamonds. Another common error is using 7104.99, which is for synthetic stones that have been worked (cut, polished, or faceted). Importers also occasionally confuse these with natural rough stones in 7103.10, but the synthetic origin mandates classification in 7104.

FAQ

What is the HS code for Rough synthetic gemstones?

The HS code for unworked or roughly shaped synthetic or reconstructed precious/semi-precious stones (excluding diamonds) is 7104.29.

What is a 'reconstructed' stone?

A reconstructed stone is made by binding together fragments of natural precious or semi-precious stones, usually by heat, pressure, or a binder, to form a single mass.