Lab-Grown Diamonds vs Natural Diamonds: What’s the Difference?

The difference between cultivated diamonds and natural diamonds lies in multiple aspects, and the following are the main differences:

formation process

Natural diamonds: In the depths of the Earth (approximately 150-200 kilometers in the mantle layer), they have undergone hundreds of millions or even billions of years of high temperature and pressure environments, slowly crystallized from carbon atoms, and brought to the surface through geological activities such as volcanic eruptions.

Cultivating diamonds: Artificially synthesized in the laboratory using high temperature and high pressure (HPHT) or chemical vapor deposition (CVD) methods. The HPHT method simulates the deep Earth environment, while the CVD method deposits and grows carbon atoms through gas decomposition, with a production cycle of only a few weeks to months.

Internal features

Natural diamonds: often contain natural mineral inclusions such as diamond negative crystals, graphite, olivine, garnet, etc., with irregular growth patterns.

Cultivating diamonds: Diamonds cultivated by HPHT method may contain metallic inclusions, while diamonds cultivated by CVD method may have point like inclusions or layered growth patterns, which are relatively regular.

price

Natural diamonds: Due to scarcity and mining costs, the price of high-quality natural diamonds can reach hundreds of thousands of yuan per carat.

Cultivated diamonds: The production cost is low, and the price is usually 1/3 to 1/10 of that of natural diamonds of the same quality. For example, the price of a 1 carat D-color VVS1 clarity cultivated diamond is about 1800-3000 yuan, while the price of natural diamonds of the same parameters may be as high as 30000 to 100000 yuan.

Rarity and collectible value

Natural diamonds: They have natural scarcity and are considered collectibles. Some rare colored diamonds or large carat diamonds have high potential for value preservation and appreciation.

Cultivating diamonds: can be produced infinitely, lacks scarcity, has low collection value, and is mainly positioned as a cost-effective choice for daily wear.

environmental impact

Natural diamonds: The mining process may involve issues such as land destruction and water pollution, and there are ethical disputes in some mining areas.

Cultivating diamonds: There is no mining damage during the production process, with lower carbon emissions, which is more in line with environmental protection concepts.

Certificate and Identification

Natural diamonds: typically certified by institutions such as GIA, with no indication of "laboratory cultivation" on the certificate.

Cultivate diamonds: The certificate will clearly indicate "Laboratory Growth" or "Lab Growth", and some cultivated diamonds are laser engraved with the words "lab growth" and certificate number at the waist edge.

It should be noted that the two have identical physical and chemical properties such as chemical composition, crystal structure, hardness, refractive index, etc. It is difficult to distinguish them with the naked eye and conventional detection methods, and accurate identification can only be achieved through professional instruments (such as DiamondView, spectroscopic analysis, etc.) or by checking certificates.