Precision in Every Diamond

Born from HPHT technology, our diamonds boast exceptional purity and structure. Ethical, engineered, and crafted with purpose—just for you.

Sustainability

Ethicality

Revolutionary

Our Diamond Technology

At EcoDiamond, we specialize exclusively in High Pressure High Temperature (HPHT) diamond growth technology - an approach that replicates the natural formation conditions of diamonds deep within the Earth’s mantle. Unlike chemical vapor deposition (CVD), which currently dominates much of the jewelry market due to its relative affordability and high-volume production, HPHT growth allows us to create diamonds with exceptional crystallinity, purity, and structural perfection.

Interestingly, even in CVD growth, the process begins with a substrate - typically a diamond seed plate—onto which carbon atoms are deposited. These seed plates are often produced using HPHT technology, especially when precision is required. At EcoDiamond, we develop tailor-made seed crystals not only for jewelry-grade diamonds with optimized size and clarity, but also for high-tech applications requiring specific properties from the very beginning - properties that we embed directly into the crystal’s structure during its growth.

Our diamonds are not just grown. They are engineered from the atomic level with purpose, precision, and integrity.

Introduction to the EcoDiamond Technology

Fig. 1. Modern phase diagram of carbon. The equilibrium line between diamond and graphite is defined by Berman-Simon calculations published in 1950.

EcoDiamond is developing and applying HPHT (High Pressure High Temperature) technology to grow single-crystal diamonds.

The success of this process depends on the development of:

specialized equipment

advanced materials

Precision Engineering

These are needed to reach the extreme pressures and temperatures required to transform graphite into diamond.

HPHT diamond synthesis involves pressure levels far beyond those used in other technologies. This challenge is intensified by the need to melt a metal solvent-catalyst and overcome the high activation energy needed for diamond formation. To meet these demands, EcoDiamond designs and builds HPHT machines that combine unique design, intensive engineering, and the use of special materials.

HPHT diamond making machines include three main components:

The device that generates high pressure (the HP apparatus)
The device (usually a multi-thousand-ton press) that creates the necessary force for ultra-high pressure
The device inserted into the HP chamber (often called a furnace, HP cell, or HP reactor), where diamond growth occurs

Only a few types of HPHT equipment are known to be capable of growing HPHT diamonds. These include the uniaxial Belt and Toroid-type presses, the multiaxial (or multi-anvil) cubic press, and a pressure-generating, pressless modification of the split-sphere apparatus known as BARS. The BARS system does not rely on an external press to generate pressure; instead, it uses internal mechanical transformation within a confined volume. To produce diamonds that meet EcoDiamond standards, our company has developed and currently operates its own unique modification of the BARS-type apparatus, known as the EcoDiamond HP machine (current model: EcoDi 350EU).

As it shown in Figure 2, the EcoDiamond HP machine doesn’t require press to generate pressures for diamond growth.

Fig. 2. Photo and diagram of EcoDiamond HP machine. The pressure in the HP cell is generated as a result of multiplication of the oil pressure produced by HP pump in a small gap between the body of the HP vessel and the membrane outside of the split sphere.

There are two main HP-HT methods to produce diamond crystals. HP-HT film growth (FG) and HP-HT temperature gradient growth (TGG).

Regardless of the method, the carbon source (usually graphite) is dissolved in a molten metal solvent-catalyst under pressures of about 4.5–5.5 GPa (45,000–55,000 atm), and then precipitates as diamond. 

The most effective solvent-catalysts are alloys of iron group metals — iron, nickel, cobalt, manganese, and chromium.

HP-HT film growth (FG)

The TGG method is optimized for growing large, high-quality diamond crystals. It takes advantage of the difference in solubility of carbon in molten metal catalysts at varying temperatures. Carbon dissolves at a higher temperature and then moves through the melt to a cooler area, where it crystallizes onto a seed diamond. This temperature gradient simplifies growth control compared to FG and enables consistent production of large single-crystal diamonds.