The Gemports Index (GPI) is an internationally recognized benchmark for colored gemstone valuation, supported by standardized units, aimed at making price comparisons of colored gemstones easier. GPI uses 2019 as its base year. Developed by Gemports as an extension of Gemports Information Services, GPI serves as a practical tool for tracking changes in the value of colored gemstones in B2B, B2C, and C2C markets.
Gemports Sapphire Index Q2 2025
GEMPORTS Press Release, July 7, 2025, Bangkok: The GEMPORTS Sapphire Index (GPI) for Q2 2025 reveals a mixed performance across different origins and treatment types. Both Sri Lankan natural and heated sapphires continued to show strong growth, driven by consistent demand from luxury markets and collectors, while both African and other sources natural and heated sapphires exhibited moderate price increases. The market remains influenced by supply dynamics and consumer preferences.
【Q2 2025 Highlights】
Nature Sapphire
• Sri Lanka: +20.5% QoQ (prev. +3.5%) | +24.7% YoY (prev. +3.5%)
• Africa & Other Sources: +6.1% QoQ (prev. +3.2%) | +9.5% YoY (prev. +3.2%)
Heated Rubies
• Sri Lanka: +16.8% QoQ (prev. -0.5%) | +16.3% YoY (prev. -0.7%)
• Africa & Other Sources: +2.8% QoQ (prev. -1.0%) | +1.8% YoY (prev. -1.0%)
【Q2 2025 Market Analysis】
Sri Lankan Sapphires Lead Growth
Prices for both natural and heated sapphires from Sri Lanka rose significantly in Q2 2025, with notable gains across all carat sizes. These gains were largely driven by:
• Strong demand from high-end jewelry brands and collectors, particularly for larger stones.
• Limited new supply from Sri Lankan mines, which has kept inventories tight.
Africa & Other Sources Show Moderate Growth
Both natural and heated sapphires from Africa and Other Sources – such as Madagascar and Tanzania, - also experienced price increases, though at a slower pace than Sri Lankan sapphires.
【Outlook for Q3 2025】
· Both Premium Natural and Heated Sapphires Likely to Maintain Momentum
With mine output from Sri Lanka remaining constrained and no immediate signs of improvement, prices for both high-quality natural and heated sapphires are expected to stay firm or continue rising. Auction activity is likely to remain robust, especially for large, gem lab-certified sapphires with transparent provenance.
· Certification and Provenance Will Be Critical
As the market becomes more polarized, transparency regarding origin and treatment status will become increasingly important. Buyers are advised to prioritize both natural and heated sapphires with third-party certification from reputable gem labs.
