Updated: Apr 15
I’m not going to get too technical on this subject as I won’t be able to fit it on this blog, so here are a few of the questions you may have before buying a Lab-Grown Diamond.
A few of my Instagram followers have asked me about Lab-grown Diamonds, and with them becoming more and more popular, I thought I could write about the differences between Diamonds to build more awareness and clear a few questions you might have.
The question on everybody’s mind is:
Are they Diamonds?
The quick answer is Yes, but here is the long answer.
A Laboratory Grown Diamond is a 100% Diamond. The only difference is the origin as laboratory-grown Diamonds are created in a lab with very similar conditions to the natural one’s.
Natural Diamonds form under Cratons, deep beneath the earth’s crust at approximately 90-120 miles with temperatures in the range of 1,150 -1,200 Degrees Celsius and pressure of 50-70kbar over millions of years. Those extreme conditions are the answers to why the diamonds are so tough and durable.
Here is a comparison chart of Natural Vs Lab-Grown Diamonds
As you can see, their chemical structure and properties are the same.
Scientists first grew diamonds in a laboratory in the mid-1950s. These diamonds were too small for jewellery, however. Production of larger, gem-quality crystals began in the mid-1990s and continues to today, with more and more companies producing Lab-Grown Diamonds.
There are two types of lab-grown Diamonds, HPHT and CVD.
HPHT – High-Pressure High-Temperature as the name suggests mimics the temperature and pressure condition that the natural diamonds forms in the earth. The rough diamond has a cuboctahedral crystal shape.
CVD - Chemical Vapor Deposition method involves breaking down the molecules of a carbon-rich gas, such as methane, into carbon and hydrogen atoms, which then are deposited on diamond seeds to produce a square-shaped, tabular diamond crystal.
Now you know about the science side of the Lab-Grown Diamonds, here is my opinion on them.
Working in independent jewellers, I’ve seen more and more clients asking about the Lab-Grown Diamonds for engagement rings, earrings and pendants. I personally don’t mind them, and I have purchased a Lab-Grown diamond for a research purpose to which I was amazed to how good it looked compared to the Natural one.
Here are the details on the Diamond I purchased:
Polish: Very Good
Symmetry: Very Good
Lab Report: IGI