Yes — in the sense that matters for a ring. A lab-grown diamond is carbon crystallised in the diamond lattice. It has the same hardness, the same refractive index, the same reaction to light. What differs is where it grew.
What the laboratories do
IGI and GIA grade lab-grown stones on the same 4Cs as mined stones, and state the growth method (CVD or HPHT) on the report. They do not grade them as a separate category of “simulant” — they grade them as diamonds with a documented origin.
What the trade regulators say
The US Federal Trade Commission's jewelry guides define a diamond by its chemical and physical properties, not by its origin, and have warned against using “synthetic” without qualification because consumers read it as fake. “Lab-grown” and “laboratory-created” are the accepted terms.
How to tell them apart
You cannot, with a loupe. Laboratories use spectroscopy and UV fluorescence to detect growth patterns and trace elements. A reputable seller will give you the report number and the laser inscription so the stone can be verified.
What “real” usually means in the argument
Sometimes it means “not a simulant” — moissanite and cubic zirconia are simulants, and lab-grown diamond is not. Sometimes it means “mined” — a scarcity and romance argument rather than a materials one. Both uses are common, and they are not the same claim.
What this means for price
Lab-grown stones cost less because production scales and supply is not constrained by geology. Prices have fallen for eight years. That is good for buyers and bad for anyone buying a lab-grown stone as an investment.
What we tell customers
If you want diamond optics and a certificate, lab-grown is a rational purchase — and we will show you the IGI report before you pay. If resale or the mined story matters, buy mined, and buy it with a report. Lab-grown diamond rings →
The people who cut the stones and set the rings. We publish what we can verify on our own bench, and link to the certificate or the guide when a number needs a source.
