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What is Lab-Grown Diamond?
Lab-grown diamonds, also referred to as cultivated diamonds, are diamonds nurtured within a laboratory setting. This concept stands in contrast to the extraction of naturally mined diamonds from the earth. Through the application of physical and chemical techniques, experts expedite the diamond growth process, resulting in lab-grown diamonds that mirror the physical and chemical attributes of their naturally occurring counterparts. The connection between natural diamonds and lab-grown diamonds can be likened to that between naturally conceived and medically assisted babies, as they share the same essential nature. Nonetheless, due to substantial variations in production costs and market reception, a significant difference in their market values persists.
What’s the different between HPHT & CVD diamond?
In the realm of lab-grown diamonds, two distinct methodologies stand out: High Pressure High Temperature (HPHT) and Chemical Vapor Deposition (CVD). While HPHT technology has a longer history, CVD has gained popularity only in recent years. However, both methods have achieved impressive cultivation outcomes through continuous technological advancement, emerging as the primary approaches for diamond growth.
HPHT technology operates on physical principles. Carbon raw materials are placed within a specially designed chamber to replicate the high-temperature, high-pressure conditions essential for natural diamond formation. Metal co-solvents are used to accelerate crystallization. HPHT diamonds often contain metallic inclusions.
Conversely, CVD technology employs chemical processes. Carbon-containing gas is introduced into a vacuum environment, resulting in carbon precipitation and crystallization through vapor deposition techniques. CVD-grown diamonds frequently exhibit black needle-shaped graphite inclusions.
When it comes to visual characteristics, distinctions between HPHT and CVD diamonds are as follows:
How to Choose a Good lab-grown Diamond?
While lab-grown diamonds are essentially the same as natural diamonds, there are many differences when shopping for them. After all, at present, the market value of laboratory diamonds is much lower than that of natural diamonds. Therefore, under the same budget, the range of choices that laboratory diamonds can provide is far greater than that of natural diamonds.
Therefore, the idea of purchasing cultivated diamonds does not always give priority to budget like natural diamonds. Generally speaking, cultivated diamonds tend to have better clarity than natural diamonds, and because the grown seed crystals are more regular than natural diamonds, it is easier to obtain the desired cutting effect.
Like natural diamonds, cultured diamonds also have their own unique waist size and can issue authoritative certificates. But even if the parameters on the certificate are very similar, it is necessary for buyers who have not seen the real thing to choose a reliable supplier. F color VS1 grade diamonds with the same cut weight, even if the color is slightly different, may bring different visual feelings, the lower the color grade, the more likely this is. In addition, the location of inclusions or inclusions can easily affect the performance of diamonds. Only an honest supplier can give customers a more realistic description and feedback.
Of course, like all artificially cultivated products, cultivated diamonds do not have high value preservation properties like natural diamonds. It is just a man-made gemstone, and its beauty is its greatest value. It is best to be mentally prepared for this before buying.