After a brutal 2025 characterized by falling prices and excess inventory, the global diamond market delivered a decisive signal of recovery in April 2026 but the rally remains highly selective.

While 0.30-carat and 0.50-carat diamonds posted their first significant monthly gains in over a year, larger categories such as 1-carat diamonds continued to face headwinds, illustrating a market increasingly bifurcated by size segment.

According to the latest Diamond Index (RAPI™) , which tracks round diamonds in D–H color and IF–VS2 clarity, the price movements for April 2026 were as follows:

0.30-carat diamonds +2.6%

0.50-carat diamonds +1.3%

3-carat diamonds +0.3%

1-carat diamonds –1.4%

This divergence is not accidental. It represents a fundamental shift in supply-demand dynamics, manufacturing activity, and geopolitical trade flows. Below, we dissect the catalysts behind the recovery, the lingering pressures, and what it means for B2B diamond sellers and buyers in 2026.

Why Small Diamonds Are Recovering (0.30 ct & 0.50 ct) -

Aggressive Supply Reduction & Inventory Drawdown -

The primary driver behind the small-diamond recovery is a sharp contraction in polished supply. During April 2026:

Global inventory of 0.30-carat diamonds dropped ~16%

Global inventory of 0.50-carat diamonds dropped ~8%

These drawdowns resulted directly from lower rough production by major miners and a deliberate slowdown in polished manufacturing, particularly in India‘s Surat region. With fewer goods circulating in the secondary market, dealers were forced to raise bid prices to secure even basic inventories for retail orders.

Slowing Rough Imports in India (-23% YoY) -

India’s diamond manufacturing sector, which polishes approximately 90% of the world‘s diamonds by volume, showed exceptional restraint in early 2026. Rough-diamond imports into India fell approximately 23% year-on-year during the first quarter of 2026, reflecting both weaker rough demand and cautious manufacturing activity ahead of the May summer recess.

By limiting rough intake, Indian polishers avoided the inventory bloat that had depressed prices in prior quarters. This disciplined approach directly supported polished prices for smaller stones.

Why 1‑Carat Diamonds Are Still Falling (–1.4% in April)

While smaller stones rallied, the 1‑carat segment continued its decline because inventory levels increased during April. Unlike 0.30 ct and 0.50 ct categories, where supply tightened, 1‑carat goods saw modest inventory accumulation, which exerted persistent downward pressure on prices.

Why the difference?

Production bias: Many manufacturers naturally produce more 1‑carat and 1.5‑carat polished stones because they align with middle‑market engagement ring demand.

Consumer shift toward larger stones: In the US market, bridal buyers are increasingly seeking 2‑carat and larger diamonds, leaving 1‑carat inventory to over‑accumulate.

SI‑Clarity Diamonds:

One of the more encouraging trends in April 2026 was the stability of SI‑clarity diamonds (SI1 and SI2). Round diamonds in D–H color, SI1–SI2 clarity saw moderate price increases in smaller sizes, showing healthier movement compared to previous months.

This is significant because SI‑clarity goods represent the sweet spot for value‑oriented retailers and online jewellers. Their recovery suggests that real downstream demand, not just speculative buying, is absorbing the available supply.

USA Retail Demand: A Tale of Two Segments

In the United States, the world’s largest diamond consumer market, demand remained steady globally as the industry prepared for the Las Vegas jewelry shows (JCK Las Vegas and Luxury). Key observations:

Mother’s Day (May 10) drove strong demand for 2‑carat and larger diamonds, especially round and elongated fancy shapes (oval, emerald, radiant). These larger stones often accompany diamond pendant and right‑hand ring purchases.

SI‑clarity diamonds in smaller sizes also moved briskly, supported by affordability‑conscious buyers.

Geopolitical Tensions Reshape Trade Flows (Dubai → Antwerp)

During the Iran‑Israel conflict escalation in March 2026, diamond dealers reportedly shifted inventory of 1‑carat and larger diamonds from Dubai toward Antwerp and other European trading centers. This de‑risking move had two market effects:

Temporary supply tightness in Dubai, which supported local spot prices for certain categories.

Increased liquidity in Antwerp, the historic diamond capital, as European buyers gained access to mid‑size goods that had been previously held in the Middle East.

India’s Manufacturing Slowdown:

India’s manufacturing sector slowed further in April ahead of its May summer recess. This seasonal slowdown was more pronounced than in prior years because:

Polished inventory had been kept deliberately low.

Profit margins for small diamonds remained thin, discouraging excessive manufacturing.

Many smaller polishing factories shifted to maintenance and worker training during the slow period.

As a result, rough‑diamond imports into India fell approximately 23% year‑on‑year in the first quarter of 2026. This is one of the steepest quarterly drops since the COVID‑19 pandemic, underscoring the industry’s commitment to supply discipline.

FAQs – Small Diamond Price Recovery 2026

Q1: Why are 0.30‑carat diamonds recovering faster than 1‑carat diamonds? A: Because inventory levels for 0.30‑carat diamonds dropped ~16% in April 2026, while 1‑carat inventory increased slightly. Lower polished production and reduced rough imports helped tighten supply for smaller sizes.

Q2: Is this recovery sustainable, or a short‑term spike? A: It depends on manufacturing discipline. If Indian polishers maintain low rough imports through Q3 2026, small‑diamond prices could continue rising. However, any surge in production would quickly reverse the trend.

Q3: Are SI‑clarity diamonds a good buy right now? A: Yes. SI1 and SI2 diamonds in sizes 0.30 ct to 0.70 ct showed moderate price increases in April, indicating genuine retail demand rather than speculation.

Q4: How do geopolitical tensions affect diamond prices? A: Conflicts (e.g., Iran‑Israel) often cause dealers to relocate inventory from high‑risk hubs (Dubai) to safer centers (Antwerp). This can create temporary supply imbalances and local price swings.

Q5: What is the RAPI™ and why does it matter? A: The Rapaport Diamond Index tracks wholesale polished diamond prices. It is the industry standard for valuing round diamonds in D–H color and IF–VS2 clarity.

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This article was researched and written on May 6, 2026, based on proprietary market data provided to CaratX, combined with publicly accessible economic indicators from the Diamond Index and industry freight data.

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