Rapaport: Small Round Diamond Prices Fell 5.5% in October

Small round diamond prices fell in October 2026 as manufacturers cleared inventory, according to a Rapaport market commentary released on November 5. The movement is relevant to jewelry buyers and suppliers reviewing prices and stock levels. It is a market signal rather than an announced change to a policy, regulation or trade rule.

October Decline in the 0.30-Carat Index

Rapaport reported that its Rapaport Diamond Index (RAPI) for 0.30-carat diamonds fell 5.5% month on month in October, its weakest performance since December 2025. The commentary attributed the decline in small round diamond prices to manufacturers clearing inventory.

Where the Price Signal May Affect Purchasing

Manufacturers and Inventory Decisions

From an industry perspective, the reported decline highlights inventory adjustment among manufacturers. Manufacturers may wish to review how their stock levels and pricing decisions relate to current demand; the report alone does not establish how long the adjustment will last.

Jewelry Buyers and Suppliers

Analysis suggests that buyers may use the index movement as one reference when reviewing quotations and purchasing plans for small round diamonds. Suppliers and buyers may also need to discuss how prices are assessed for particular orders. The reported index change does not establish an identical price movement for every stone or transaction.

Reviewing Prices and Stock Commitments

Compare Quotations Carefully

Buyers could check whether quoted stones match the characteristics and quantities they intend to purchase before using the reported index movement in negotiations. The supplied information does not specify transaction-level pricing or prescribe a method for revising quotations.

Assess Existing Inventory

Manufacturers and jewelry buyers may review their exposure to small round diamonds in stock alongside planned purchases. This may help them assess the implications of a price change without assuming that the October movement will continue.

Check Order Terms

Before making commitments, trading partners could review the pricing and delivery terms applicable to their orders and clarify any proposed changes with counterparties. The information provided does not identify any new contractual, certification or compliance requirement.

What the October Reading Does and Does Not Establish

At this stage, it is more appropriate to treat the reported decline as a market signal associated with inventory adjustment, not as a rule taking effect or an instruction to change purchasing practices. Further Rapaport commentary and market feedback may help businesses assess whether the October reading represents a continuing pattern; neither is established by the supplied summary.

A Measured Response to the Price Movement

The reported 5.5% decline gives buyers and suppliers a reason to review pricing assumptions and inventory commitments for the relevant category. Its practical significance will depend on the stones and transactions involved, so it is best used as an input to further assessment rather than as a fixed price rule.

Basis for This Report

This article is based on the user-provided title, event date and summary of Rapaport's market commentary. No specific official source link was provided in the input, and the underlying commentary and subsequent market developments remain subject to verification. Further Rapaport publications and industry feedback may be useful in assessing later price movements and inventory adjustments.