Wholesale Diamond Buying Guide

By TR GEMS Trade DivisionPublished 2026-06-057 min read
Calibrated loose diamonds arranged in layout sheets ready for wholesale parcel selection.

Sourcing loose diamonds in bulk requires a solid procurement workflow. Whether you operate a regional retail boutique network or a high-volume jewelry manufacturing line, partner with a direct diamond manufacturer to reduce costs and maintain inventory consistency.

Direct Factory vs Intermediary Suppliers

Buying from a diamond wholesaler or broker adds intermediary markup costs. Working directly with a diamond manufacturer like TR GEMS gives you access to factory-direct pricing and custom sorting capabilities.

Establishing Your Sourcing Criteria

  • Sieve Sizes: Specify diameter limits (e.g. 1.0mm - 1.5mm) for pavé layouts.
  • Assortment Consistency: Define color bases (e.g., G-H) and clarity tolerances (e.g., eye-clean VS2).
  • Regulatory Proofs: Confirm Kimberley Process compliance sheets accompany the parcel.

Frequently Asked Questions

How are wholesale diamond prices calculated?

Wholesale diamond prices are calculated using the Rapaport Diamond Report index as a benchmark, adjusting for parcel size, cut consistency, and trade payment terms.

What is a calibrated parcel?

A calibrated parcel is a lot of loose diamonds sorted to match in dimensions, color, and clarity, allowing jewelry manufacturers to set stones directly in mass-production lines.