Diamond Market: April 2026

Welcome to our monthly column dedicated to the diamond market. Each month, we explore the key global trends, major developments, and market dynamics shaping demand, pricing, and commercial strategies. Drawing on trusted sources such as Rapaport News, IDEX, and other leading industry channels, we provide timely, accurate, and reliable insights.

General Market Trend

In April 2026, the diamond market showed signs of recovery following the significant downturns recorded in 2025. However, market dynamics remained fragmented, with very different performances depending on stone size and geographic region.

One positive development was the slowdown in production by the industry’s major players, which led to a reduction in available inventory. This made smaller-carat stones scarcer, contributing to rising prices. In contrast, larger diamonds experienced a negative trend, reversing the positive momentum seen in recent months.

From a geographic perspective, a clear divergence between markets continued to emerge: diamonds sold outside the United States performed better than those in the American market. In Europe, trading hubs such as Antwerp benefited from shifts in trade flows, driven mainly by geopolitical tensions in the Middle East, further strengthening their strategic role in international distribution.

Price Trends

In April 2026, the market showed mixed dynamics, with a strong recovery in the smaller-carat segment and declining prices for larger stones.

According to the RapNet Diamond Index (RAPI™), standard-quality one-carat round diamonds (D–H, IF–VS2) recorded a 1.4% decline, showing a slight improvement compared to March’s 1.7% drop. By contrast, smaller stones experienced notable price increases: prices for 0.30-carat diamonds rose by 2.6%, while 0.50-carat stones gained 1.3%. Three-carat diamonds remained broadly stable, posting a modest increase of 0.3%.

These shifts reflect a complex market reality: the supply of 0.30- and 0.50-carat diamonds declined significantly (by 16% and 8% respectively, according to RapNet), following reductions in both rough diamond production and polished stone manufacturing. At the same time, inventories of 1-carat diamonds increased by 1.5%, pointing to an oversupply in this segment.

Prices for SI-clarity stones (SI1–SI2), which represent a significant share of the retail market, remained stable or recorded slight increases, ranging from 0.4% to 1% depending on carat size. In the fancy diamond segment (non-round shapes), prices remained broadly unchanged, with only minimal fluctuations. Significant price increases were observed only for stones above 3 carats, driven by strong demand from collectors and investors, particularly for colorless D-flawless diamonds.

An interesting trend emerging from this market environment relates to changing consumer preferences: while prices for smaller-carat diamonds edged higher due to reduced supply, high-value diamonds (7 carats and above) attracted particularly strong interest, highlighting the market’s growing segmentation. The lack of a stable “middle segment” underlines how quality, rarity, and uniqueness continue to be the key factors supporting the strength of today’s diamond market.

Insights from the Diamond World

The First World Diamond Day: When Diamonds Tell Stories

April 8, 2026 marked the launch of the first-ever World Diamond Day, an international initiative promoted by the Natural Diamond Council aimed at reinforcing the symbolic and emotional value of natural diamonds.

Rather than a traditional campaign, the initiative became a true global moment of shared storytelling: people from more than 50 countries posted images and personal stories connected to their jewelry, from engagement rings to family heirlooms and meaningful life moments.

The initiative also generated significant visibility. Content related to the event reached approximately 30 million people, while online searches for natural diamonds increased by 30% compared to the weekly average.

Support came not only from consumers, but also from a wide range of industry players, including high jewelry maisons, gemological institutions, and international trading centers, all of which helped promote an event that is expected to become an annual tradition.

The message is clear: in a market increasingly driven by pricing dynamics and the growing presence of synthetic diamonds, natural diamonds continue to stand out for their symbolic value, rooted in personal stories, authenticity, and lasting memories.

Jewelry and Design: Milan Design Week 2026 as a Stage for Luxury

The 2026 Milan Design Week 2026 (April 20–26) once again confirmed its status as one of the world’s leading events for innovation and creativity in the design industry. This year, the event dedicated significant space to the world of jewelry, transforming the city into an open-air gallery.

Numerous galleries and exhibition spaces hosted installations showcasing jewelry pieces that challenged traditional conventions by combining high jewelry, interior design, and technological innovation.

Among the many creations on display, diamonds maintained their role as the central protagonists, though in a strikingly reimagined form. Rather than being confined to classic rings or traditional necklaces, diamonds were incorporated into contemporary art installations, paired with innovative materials, and presented in unexpected contexts.

Final Thoughts

April 2026 confirmed that the diamond market continues to evolve in a dynamic and increasingly segmented way.

Both the Milan Design Week 2026 and the first-ever World Diamond Day further demonstrated that natural diamonds are far more than simple investment assets — they are objects rich in emotional, artistic, and personal meaning. In a context of growing awareness and sophistication, understanding the true value of one’s jewelry and diamonds has never been more important.

At Auctentic, we provide independent, expert evaluations of fine jewelry and diamonds with discretion, transparency, and care.

Our approach is centered on helping clients gain clarity and make informed decisions with confidence, whether for insurance, inheritance, collection management, or a deeper understanding of their assets. Every consultation is conducted thoughtfully and entirely at the client’s own pace, without pressure or obligation.

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