Memorial diamonds grown in the laboratory

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The personal diamonds grown in the laboratory  from the ashes of people or pets (also called artificial diamonds and diamonds created in the laboratory) are more beautiful, ethical and affordable than anything we get from the earth. We reproduce the Earth’s natural process by crystallizing carbon into shiny diamonds, which are chemically, optically and physically identical to the diamonds mined on earth, but have a   price of up to 40% lower  and do not contain any environmental or humanitarian problems.

Think of it as making ice in your freezer instead of getting it from the glacier; both are ice, regardless of origin.

How are diamonds made from animal hair or wool in the laboratory?

Each diamond created in the laboratory is grown by placing a diamond “seed” in a heat and pressure chamber. This camera simulates a natural growing process. Crystallization occurs, allowing the laboratory-grown diamond to mature within six to ten weeks. Then it is cut, polished and evaluated by the same world famous laboratories that certify diamonds mined on the ground. In the laboratory, the following two methods are most often used:


Chemical vapor deposition, or CVD, is a process used to create precious diamonds, as well as optics and semiconductors. The CVD process uses ultrapure gases with a high carbon content in a controlled chamber. Carbon-based gases, such as methane, are heated until they decay, which allows the separation of carbon atoms in the gas. These tiny carbon atoms fall on a diamond substrate and accumulate layers, resulting in a coarse diamond crystal. This process takes six to ten weeks to produce Type IIa diamonds.

In recent years, CVD research has gained popularity, and modified versions of CVD are currently being used. These processes differ in the way chemical reactions are initiated. Some of these options include:

  • Low Pressure CVD (LPCVD)
  • Ultra High Vacuum CVD (UHVCVD)
  • Plasma chemical vapor deposition (PECVD)
  • Microwave Plasma Spray (MPCVD)
laboratory-grown seed-growing diamond


High temperature high pressure, or HPHT, recreates the natural growing medium of diamond from hair or dust found deep in the ground. Used machines are capable of creating a pressure of almost 60,000 atmospheres and a temperature of 2500 degrees Celsius.

The growth cell contains all the elements necessary for growing diamond, including seed, highly purified graphite and a catalytic mixture consisting of metals and powders. The cell is located in the center of the HPHT camera. Constant temperatures are applied, reaching 1300 degrees Celsius and more than 50,000 atmospheres. The catalysts inside the cell are the first to react to the added heat and pressure and transfer from solid to molten form.

The molten catalyst solution causes graphite to dissolve inside the cell. Once all the necessary conditions are met, the cooling process begins. This process takes several days and allows carbon atoms to grow on the seed. The cell is removed from the HPHT machine after the completion of the growth cycle. New rough diamond is removed and refined to prepare for final cutting and polishing.

The entire HPHT growing process requires an incredibly controlled environment for the production of gem-quality diamond. Any change or change during growth can cause the diamond to stop growing or create inclusions that will lead to the appearance of diamonds that cannot be used. Each diamond must complete the entire growth cycle before the machine can be opened. Only after opening the HPHT camera can we see the finished rough diamond, its color, clarity and size.

As part of the HPHT process, there are three main tools that are used to measure the pressure and temperature required to produce the diamonds created in the laboratory. These:

  1. Bars Press  — Bars Press is the most effective tool for the production of precious diamonds. It uses a combination of internal and external anvils to apply hydraulic pressure to the growth chamber. Like in Urmydiamond
  2. Belt Press  — Belt Press is the fundamental technology for growing diamonds. It can be large and produce several diamonds in one cycle, using two large anvils that are compressed to create the necessary pressure. It is capable of producing gem-quality diamonds, but is most often used for the production of diamonds and diamond powder for industrial purposes.
  3. Cubic Press  — The Cubic Press can be large and use six separate anvils to create the necessary pressure for the growth of diamond crystals. It is also used to create diamond powder for industrial purposes.

Lab Grown Diamond Benefits


Our laboratory-created diamond collection is available up to IF clean, D in color, perfectly cut and up to 10 carats in size. They come in many forms, including a round, pink, emerald, pillow, oval, oval rose, heart, princess, trillion and shining. Colors include white, yellow, blue, pink and green. 


Unlike other retailers, every Urmydiamond created in the laboratory is type IIa, the purest form of a diamond. They are harder and brighter than type Ia diamonds. Only 2% of diamonds mined on earth have this quality.

In addition, each diamond is evaluated and certified by the same leading independent gemological laboratories that are used to evaluate diamonds mined on the ground.


Diamonds created in the laboratory cost 40% less than their mined equivalents. Buyers Beware: Watch for “grown diamonds” sold for a few hundred dollars per carat. If the deal seems too good to be true, it is probably true. Only diamond simulators fall into this price range.


Each diamond created in the laboratory from MiaDonna is guaranteed to be conflict free and comes from the first countries of the world, where they are processed and processed in a controlled laboratory environment.

Unlike diamonds mined on earth, our artificial diamonds are created without harm to indigenous communities, society or the Earth.

According to a 2014 Frost & Sullivan report,   “laboratory-grown diamonds are seven times less harmful to the environment than mined diamonds, they use significantly less resources and emit a small fraction of air pollution.” 

Let the numbers speak for themselves:


Extraction of diamonds mined on the ground leads to disruption of hundreds of hectares of soil (approximately 0.00091 hectares per carat), excessive carbon emissions and other greenhouse gas emissions, which lead to poor air quality and pollution. In addition, approximately 126 gallons of water are used for every 1.0 carats of mined diamond.


The amount of land disturbed during the creation of the diamond grown in the laboratory is 0.00000071 ha per carat. Water use is also minimal: approximately 18.5 liters was used to create a 1.0-carat diamond grown in the laboratory.

Source: Frost & Sullivan — Environmental Impact Analysis

Guaranteed Conflict FreenotYes
Hardness (MOHS)1010
SP3 Carbon Diamond Bonds (%)100%100%
Internal crystal structureFace-centered CubeFace-centered Cube
Refractive index2.422.42
colorDifferent GradesK to D grades
A cutBad for the idealVery good to perfect

Urmydiamond has established strong partnerships with the world’s most advanced diamond producers and cutters, who share our core values ​​to offer our customers the largest selection of exclusively grown diamonds at an affordable price and guaranteed conflict-free. 

What colors are available?


Pure carbon diamond without impurities will be evaluated as a colorless diamond. However, most mined and laboratory diamonds contain impurities, most of which are nitrogen. The nitrogen atoms in the diamond lattice create a yellow tint. In the case of fancy colored diamonds, pure yellow is created. Almost all diamonds, both mined and created in the laboratory, start as yellow diamonds.

For millions of years, and the effects of pressure and heat, mined diamonds split nitrogen atoms in their lattice, giving nitrogen atoms the opportunity to emit yellow light. The fission of nitrogen atoms gives the diamond the ability to shine white.

In the case of diamonds created in the laboratory, we do not have millions of years to convert yellow diamond to white, but the ability to grow a diamond with little or no nitrogen gives the same result.

Growth time

Growing white diamond requires an incredibly controlled environment. Heat and pressure must remain constant throughout the growing process. Any fluctuation or change within the growth cell can cause the diamond to stop growing or to create heavy inclusions.

Removing nitrogen and boron from the growth cell to remove color from the diamond lattice also causes the diamond to grow more slowly. White diamonds usually take up to two weeks or longer to grow a 1.0-carat stone.

It is the long growth time, the need to extract certain elements from the growth chamber, and the need to maintain a constant temperature and pressure that make it difficult to grow white diamond, thereby contributing to their limited availability.

Available Forms

White diamonds give a square roughness. This allows you to make the most popular forms: round, princess, usher, pillow and emerald. These forms complement the rough diamonds and, in turn, produce the highest yields. Elongated forms such as oval, marquise and pear, as a rule, are not produced due to their need for more elongated roughness.


All laboratory-made white diamonds offered by MiaDonna are cut manually. Each diamond comes with an individual grade from IGI or GCal and shows its cut rating in the grade report. Each diamond is faceted to maximize brilliance and color.


The purity of the white diamond created in the laboratory is evaluated in the same way as the diamond mined on the ground, usually in the range from IF to SI2. All evaluations are performed by either IGI or GCal and are included in every Lab-Created Diamond offered by Urmydiamond .


The yellow MiaDonna diamonds created in the laboratory are optically, chemically, and physically identical to the yellow diamonds mined on the ground, but are offered without conflict and average 10% of the cost. They are available in a range of colors from fancy yellow to fancy bright yellow, in sizes up to 2.0 carats and a variety of shapes.

Both mined and laboratory-created yellow diamonds get their color from nitrogen. Although diamonds are made of carbon, impurities exist in the stone. It is the introduction of these impurities, in this case nitrogen, that will ultimately give the diamond a yellow color. As diamond grows, nitrogen atoms sometimes replace the carbon atom in the structure of the diamond lattice. As soon as light enters the diamond, nitrogen will reflect back yellow light.

By controlling the amount of nitrogen in the process of growing diamond, you can choose the color of the finished diamond. The more nitrogen there is in the diamond, the yellower it will be. Too much nitrogen and the diamond will begin to appear brown. Getters are used during the growing process to capture excess nitrogen in the growth cell. Using miners, we can grow yellow diamonds with the most desirable colors of precious quality.

Many laboratory-made diamonds are available in yellow and orange-yellow. A diamond created in the laboratory gains its orange color from the solvents used in the growing process. These diamonds are grown in molten metal solution. Orange comes from a solvent trapped in the diamond lattice itself during the growing cycle. These solvents, combined with nitrogen trapped in the lattice structure of the diamond, give the diamond an orange / yellow color.

Choosing a yellow or orange / yellow diamond color is a personal choice. The assortment we provide is one of the most commonly grown and purchased flowers.

Growth time

It takes five to six days for one cycle on a growing machine to get enough rough diamonds to cut yellow diamond weighing 1.0 to 2.0 carats. The nitrogen left in the growing process, which gives the yellow diamond its own color, actually helps the diamond grow faster than any other color.

Available Forms

Most yellow diamonds grow in the shape of an octahedron with a truncation. Square shapes such as radiant, princess, pillow, snake and emerald are commonly used to get the most out of rough diamonds. Round diamonds are also available. Due to the square nature of the yellow roughness, elongated shapes such as pear, oval and marquise are not usually produced.


The blue diamonds created in the laboratory are optically, chemically and physically identical to the blue diamonds mined on the ground and are offered without conflict and account for about 10% of the cost. They are usually offered in sizes less than 1.50 carats and come in a range of colors from unusual light blue to bizarre intense blue.

Both mined and laboratory-created blue diamonds get their color from boron. Although diamonds are made of carbon, impurities exist in the stone. It is the introduction of these impurities, in this case boron, that will ultimately give the diamond a blue color. As the diamond grows, a controlled amount of boron is introduced into the growth cell, which then enters the lattice structure of the diamond. Controlling the amount of boron in the growth cell also allows you to control the finished color. As soon as light penetrates the diamond, the boron will reflect back the blue light.

Growth time

For one cycle, it takes seven to ten days on a growing machine to get enough rough diamonds for a finished blue diamond up to 1.0 carat in size. The boron introduced during the growing process, which gives the blue diamond its own color, actually helps the diamond grow faster than the white diamond. However, it will grow slower than the yellow diamond.

Available Forms

Most diamond diamonds grow in hexa-cubic form. Round and cut angular shapes, such as radiant, pillow, pupil and emerald, are usually used to get the most out of rough diamonds. Due to the hexa-cubic nature of the blue roughness, princess cutouts and elongated shapes such as a pear, oval and marquise are usually not made.


MiaDonna pink diamonds created in the laboratory are optically, chemically and physically identical to pink diamonds mined on the ground, but are offered without conflict and account for about 5% of the cost. They are generally readily available in sizes below 2.0 carats and range in color from fancy pink to fancy dark pink.

Unlike white, blue and yellow diamonds created in the laboratory, which acquire their color during the growing process, pink diamonds acquire their color during processing after growth, called irradiation and annealing.

Some light yellow diamonds are most often used to create pink shades. Watering a diamond with electrons and neutrons (irradiation), we can change the structure of the diamond crystal lattice and create a new color center. During the second stage of annealing, the stone is heated to help smooth out the changes that have occurred as a result of irradiation, and to help get a finished diamond color.

Complementary colors are available, such as purple, red, and green, which are produced after processing using the same process as pinks. The color created during processing is consistent and safe under normal conditions of wear. When installing, repairing or servicing colored diamond, care must be taken when exposed to high temperatures, such as a jewelry torch. Exposure to extreme temperatures can cause color discrepancies

Available Forms

The vast majority of pink diamonds created in the laboratory will be machined or formed in the same way as yellow diamonds. A pink diamond created in the laboratory starts with a yellow diamond. The raw yellow diamond has a truncated octagonal shape. Square shapes such as radiant, princess, pillow, snake and emerald are commonly used to get the most out of diamonds. Round diamonds are also available. Due to the square nature of the pink roughness, elongated shapes such as pear, oval and marquise are usually not produced.


The purity of a pink diamond depends on its color. Pink colors, which are fuller in saturation or have more pink color, will provide lower transparency, while soft or light pink may require higher transparency. In any case, as long as the inclusions of diamond are not visible to the naked eye (clean eyes), you should be safe. Clarity will affect the price, so in many cases, buying a diamond that is cleaner than the eye, compared to a diamond with a higher degree of purity, will not only save you money, but will also look just as good when viewing under normal conditions. 

Read more:

They are real! The expert reveals the main differences between laboratory-grown memorial diamonds and mined diamonds, including cost reduction and ethical work.

The ashes of people and pets are turned into sparkling yellow diamonds — and here’s how:

Why do people turn ash into memorial diamonds in the UK?


Memorial diamonds — a growing alternative to burials according to Urmydiamond

Beyond the hype about laboratory-grown memorial diamonds



Remember your loved one — like a diamond

From ashes to diamonds


Are memorial diamonds natural?

From ashes to diamonds: a new disruptive alternative after cremation on the rise

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