Diatomite, also called diatomaceous earth (DE), is a naturally occurring siliceous sedimentary rock formed from fossilized remains of diatoms—single-celled aquatic algae with hard silica shells. It stands out for exceptional physical properties: high porosity, large surface area, low density, chemical inertness, excellent thermal insulation, strong adsorption capacity, and superior filtration performance. These traits make it a high-value industrial mineral across multiple sectors.

Filtration remains the largest application, accounting for over 40% of global demand. Diatomite is widely used as a filter aid in beer, wine, beverages, edible oil, pharmaceuticals, and municipal water treatment, efficiently removing solids, bacteria, and micro-pollutants. It also serves as a functional filler in paints, coatings, plastics, rubber, and construction materials to enhance durability, whiteness, and lightweight performance. In agriculture, it acts as a natural insecticide, soil conditioner, feed anti-caking agent, and carrier for fertilizers, supporting organic farming trends. Additionally, it is used in industrial absorbents, environmental remediation, and thermal insulation products.

The global diatomite market is on a steady growth track. Market data shows 2026 volume is expected to reach 2.12 million tons, with a 5.23% CAGR from 2026 to 2031. By value, the market is projected to hit about 1.26 billion in 2026 and rise to 2.08 billion by 2035, growing at a 5.7% CAGR. Key growth drivers include rising demand for food & beverage safety, expanded water treatment infrastructure, sustainable construction materials, and eco-friendly agricultural inputs.

Regionally, North America and Europe hold mature markets, while Asia-Pacific, led by China, grows fastest due to industrial upgrading and environmental regulations. Major producers focus on calcined/flux-calcined high-purity grades to meet high-end industrial needs. With sustainability and circular economy trends, diatomite will keep expanding in green manufacturing, water treatment, and new energy sectors.

As a versatile, eco-friendly mineral, diatomite is becoming indispensable in modern industry. Its stable supply chain, technological upgrades, and diversified applications will sustain long-term market growth, offering solid opportunities for investors and industrial users worldwide.