A lab-grown diamond glossary defines the grading, certification, and jewelry terms you will see when shopping for engagement rings and fine jewelry. Use these definitions alongside our buying guide and FAQ.
A lab-grown diamond is a real diamond created in a laboratory using CVD or HPHT technology rather than mined from the earth.
Lab-grown diamonds have the same chemical composition (pure carbon), hardness (10 on the Mohs scale), brilliance, and optical properties as mined diamonds. IGI and GIA grade both types using identical 4Cs standards. They typically cost 60–80% less than comparable mined stones, making larger or higher-clarity diamonds accessible within the same budget. To the naked eye, lab-grown and mined diamonds look identical.
A method of growing diamonds by depositing carbon vapor onto a seed crystal in a vacuum chamber.
CVD produces high-quality diamonds used in fine jewelry. The process can take weeks and yields stones indistinguishable from mined diamonds to the naked eye.
A diamond growth method that replicates the heat and pressure found deep in the Earth.
HPHT was the first commercial lab-diamond process. It creates real diamonds suitable for engagement rings and certified jewelry.
Cut, Color, Clarity, and Carat — the four standard attributes used to grade diamonds.
Cut affects sparkle most; color and clarity describe appearance; carat measures weight. IGI reports document all four for lab-grown stones.
How well a diamond's facets interact with light, graded from Fair to Excellent or Ideal.
Excellent or Ideal cut grades maximize brilliance and fire. Cut is often the most important factor when choosing a lab-grown diamond.
A letter scale from D (colorless) to Z (light yellow or brown) describing a diamond's body color.
D and E color grades appear colorless and are popular for engagement rings. Lab-grown diamonds often achieve top color grades at accessible prices.
A measure of internal inclusions and external blemishes, graded from FL (flawless) to I3.
VS (Very Slightly Included) or better is eye-clean in most settings. Lab-grown diamonds frequently offer high clarity within budget.
A unit of weight equal to 200 milligrams, used to describe diamond size.
Carat weight affects price significantly. Lab-grown diamonds allow larger carat sizes for the same budget compared to mined stones.
A leading gemological laboratory that certifies lab-grown and mined diamonds.
IGI reports document the 4Cs, proportions, and laser inscription. Diamond Sensations provides IGI certification on its lab-grown diamonds.
An independent authority that grades diamonds and issues widely recognized reports.
GIA uses the same grading standards for lab-grown and natural diamonds. Some Diamond Sensations stones may also carry GIA certification.
A diamond with no visible inclusions when viewed face-up at a normal viewing distance.
VS clarity and better is typically eye-clean. This term helps buyers prioritize appearance over microscopic details on a report.
A microscopic identification number etched on a diamond's girdle linking it to its grading report.
Laser inscriptions verify authenticity and match the stone to its IGI certificate. Diamond Sensations includes inscribed stones for traceability.
The white light reflected from a diamond's surface and interior.
Brilliance depends primarily on cut quality. Well-cut lab-grown diamonds display the same sparkle as mined diamonds.
The metal framework that holds the center diamond and any accent stones.
Popular settings include solitaire, halo, and three-stone designs. Diamond Sensations offers 14KT, 18KT gold, and platinum settings.
Small accent diamonds, typically under 0.20 carat, used in halos and pavé bands.
Melee adds sparkle around a center stone. Lab-grown melee offers consistent quality and ethical sourcing for detailed designs.
A setting style where small diamonds are set closely together along a band.
Pavé bands create continuous sparkle. Lab-grown pavé diamonds make this look more affordable without sacrificing brilliance.
A ring design featuring a single center diamond without a halo or side stones.
Solitaires showcase one certified lab-grown diamond. They remain the most popular engagement ring style.
A diamond's tendency to emit visible light under ultraviolet (UV) light.
Most diamonds have none or faint fluorescence. IGI reports note this trait; it rarely affects appearance in everyday wear.
A diamond sourced without funding armed conflict or human rights abuses.
Lab-grown diamonds are inherently conflict-free because they are created in controlled laboratory environments rather than mined from the earth.
A professional valuation of a diamond's market worth for insurance or resale.
IGI-certified lab-grown diamonds can be appraised like mined stones. Keep your grading report for insurance documentation.
