Lab grown diamonds are diamonds created in a laboratory and which have the exact same chemical, physical, and optical appearance as natural diamonds. After crystallization occurs, diamonds mature for six to ten weeks in an environment that mimics the environment in which natural diamonds are created. While it is clear that behind natural diamonds lurk the problems of child labor, poor working conditions, local pollution, and funding of conflict that come from mining, lab diamonds do not require mining and are fully traceable, making them free from the problems that natural diamonds have. Furthermore, the quality of lab grown diamonds produced under exceptional techniques is often better than that of their natural counterparts.

Lab grown diamonds have the same physical, chemical, and optical properties as natural diamonds. In other words, they exhibit the same hardness, fire and brilliance as natural diamonds. The difference between the two lies in the environment in which they are created. While lab grown diamonds are formed in laboratories over a period of 6-10 weeks under conditions that mimic those of the Earth's mantle, natural diamonds are formed deep within the Earth (about 150 km beneath the Earth's crust) in hot, high-pressure zones over a period of months to hundreds of years.

Premium Quality
Lab grown diamonds are grown in highly controlled environments in laboratories, resulting in beautiful diamonds with a more distinguished brilliance. While approximately 98% of natural diamonds contain impure elements, lab grown diamonds use a sustainable process using chemical vapor deposition (CVD), resulting in high quality, mostly impurity-free diamonds.

Ethical
Lab grown diamonds are a more ethical choice for the environment and human rights, as they do not require mining and are therefore not involved in child labor, poor working conditions, local pollution, or conflict issues.

Accessible Price Range
Lab grown diamonds cost less than natural diamonds. This also allows you to enjoy luxury on a daily basis. You can make your ideal stone a reality.

Fancy Color Option
Fancy colors, which are very rare and expensive in natural diamonds, can be created with lab grown diamonds, allowing you to have the jewelry of your dreams.

The cut is the most important factor in bringing out the maximum brilliance of a stone. The overall proportions of the diamond and the size and position of the facets make up the cut.
At MIYAMA, we only offer Excellent to Very Good, which are the ideal cuts to bring out the maximum brilliance of the diamond.

Color is one of the factors that determines the value of a diamond. The more colorless and transparent the stone is, the higher the value of the stone. However, fancy colored diamonds retain their color as yellow, brown, or pink, and are often quite rare in the natural diamond world, which is why they are often highly priced. Each diamond is graded by an expert according to the GIA Diamond Scale. Grades range in color from D (clear and colorless) to Z (light yellow).

Carat refers to the weight of a diamond.
It is said that about 250 tons of ore must be mined to find a natural diamond of one carat. Therefore, due to their rarity, larger diamonds are more valuable. However, it is now possible to make diamonds in laboratories ("lab-grown diamonds") and obtain them at a much more reasonable price than natural diamonds. Since lab-grown diamonds are chemically, physically, and optically identical to natural diamonds, their value is determined by the 4C's.