The first lab-grown diamond was created in 1954 by General Electric, as part of a project called Project Superpressure. The goal was industrial - to produce a material harder than anything available for use in cutting tools, drill bits, and industrial abrasives. The result was a tiny, yellowish crystal. Not pretty. Extremely useful.
Gem-quality lab-grown diamonds came later, as the processes improved. By the 2000s, two techniques dominated: high-pressure high-temperature (HPHT), which replicates the conditions deep in the earth, and chemical vapour deposition (CVD), which grows diamond layer by layer from a carbon-rich gas.
The result in both cases is diamond: the same carbon crystal structure, with growth features that gem labs can identify using specialised equipment. The same hardness. The same refractive index. The same fire and brilliance. To the naked eye, a trained gemologist cannot reliably separate lab-grown from mined; distinguishing origin requires specialised instruments.
The diamond industry spent considerable effort arguing that lab-grown diamonds were not "real" diamonds. This argument has largely failed on scientific grounds and increasingly on commercial ones. Lab-grown diamonds now account for a significant and growing share of sales, particularly at lower price points.
The interesting question isn't whether they're real. It's what the mined diamond's premium now represents. Without scarcity as a justification - scarcity that was always partly engineered anyway - what remains? The geological age? The journey from the earth's mantle? The sense that something rare was found rather than grown?
These are legitimate distinctions. Whether they're worth the price difference is a question each buyer answers for themselves.
