Cabochon

When sourcing cabochons, you must prioritize dimensional accuracy and surface finish. Ensure the calibrated sizes (e.g., 10x14mm, 18x25mm) have a tolerance of no more than ±0.2mm to fit standard jewelry settings. The dome height (high, medium, or low) should be consistent across the batch to ensure uniform aesthetics. For the surface, look for a high-gloss polish free of visible scratches, pits, or 'orange peel' textures. Additionally, verify the flatness of the base; a perfectly flat back is essential for secure gluing or bezel setting.

It is critical to request a Material Disclosure Statement from the supplier. For natural stones, ask if they have undergone stabilization (common for turquoise), heat treatment, or dyeing. If you are purchasing high-value stones like opal or moonstone, require third-party lab certifications (such as GIA or NGTC). For synthetic or 'lab-grown' cabochons, ensure they are clearly labeled to avoid legal issues regarding consumer protection laws in your target market. Always request high-resolution macro photos or a video inspection of the specific lot before shipment.

Compliance primarily focuses on chemical safety and ethical sourcing. Ensure the stones and any backing materials comply with REACH (EU) or CPSIA (US) regulations, specifically regarding lead and cadmium content. If sourcing organic materials like coral or certain shells, you must verify CITES (Convention on International Trade in Endangered Species) documentation to prevent customs seizures. Furthermore, professional buyers should prioritize suppliers who adhere to Responsible Jewellery Council (RJC) standards to ensure conflict-free supply chains.

Cabochons are prone to chipping and scratching. Insist on vacuum packaging or individual compartment trays rather than bulk bags to prevent stones from rubbing against each other. Use double-walled corrugated boxes with sufficient internal padding. For high-value orders, utilize Trade Assurance services on Made-in-China.com to ensure that the payment is only released once the quality is verified upon arrival.

Negotiation should be based on volume and consistency. For standard sizes, aim for a 15-20% discount when moving from sample quantities to bulk (e.g., 1,000+ pieces). If you have custom shapes, offer to pay a one-time tooling or cutting fee in exchange for a lower per-unit price. Always clarify if the price includes polishing and sorting costs, as some low-cost quotes may include 'run-of-mine' quality which has a high reject rate.

Accurate HS Code classification is vital; typically, worked precious or semi-precious stones fall under Chapter 71. Ensure the Commercial Invoice clearly states the material (e.g., 'Synthetic Cubic Zirconia' vs 'Natural Amethyst') to avoid customs delays or overpayment of duties. For small, high-value parcels, air express (DHL/FedEx) is preferred for its tracking reliability, while larger glass or resin cabochon orders are more cost-effective via LCL (Less than Container Load) sea freight.